| Agent Based Modeling and Simulation Framework for Supply Chain Risk Management |
Mar 2012 |
158 pages |
| Authors:
Tiffany J Harper; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | This research develops a flexible agent-based modeling and simulation (ABMS) framework for supply chain risk management with significant enhancements to standard ABMS methods and supply chain risk modeling. Our framework starts with the use of software agents to gather and process input data for use in our simulation model. For our simulation model, we extend an existing mathematical framework for discrete event simulation (DES) to ABMS and then implement the ... |
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| An Enhanced Fuselage Ultrasound Inspection Approach for ISHM Purposes |
Mar 2012 |
97 pages |
| Authors:
Francisco Ospina; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This effort constitutes a systems engineering approach in which the materials science, ultrasound structural health monitoring, flight and maintenance operations, and relevant aeronautical policies and programs are involved to explore the evolution and characterization of structural cracks in aircraft fuselage structures in which the loads are varying. During flight, an aircraft fuselage skin and structure are subjected to varied cyclic loads, which can cause embedded cracks and other damage features ... |
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| Impact of Decision Criteria on Federal Aviation Administration Certification of Military Commercial Derivative Aircraft |
Mar 2012 |
121 pages |
| Authors:
Michael S Low; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The decision regarding whether to maintain Federal Aviation Administration certification of military commercial derivative aircraft (MCDA) can be extremely difficult due to the subjective nature of some of the associated costs and benefits. The purpose of this research is to help decision makers understand the level of impact those costs and benefits have on their decision, and how that impact may change over the life cycle of the MCDA fleet. ... |
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| Improving Knowledge of C-130 Aircraft Condition: A High Velocity Maintenance Case Study |
Mar 2012 |
66 pages |
| Authors:
Marcus R McWilliams; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| High Velocity Maintenance (HVM) seems poised to revolutionize the way the Air Force schedules and performs depot-level maintenance on its aircraft. The four tenets of HVM -- Known Condition of the Aircraft, Supportability, Daily Standard Work, and High Burn Rate -- provide the basis for the Air Force's Air Logistics Centers (ALCs) to improve the quality of planning and scheduling that goes into each aircraft's depot maintenance visit. These tenets ... |
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| A Simulation Based Analysis of the B-1B's AN/ALQ-161 Maintenance Process |
Dec 2011 |
13 pages |
| Authors:
Raymond R Hill; Daniel Mattioda; Ricardo Garza; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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| The Air Force is investigating the use of three levels of aircraft maintenance. This work examines the effect of maintenance resource collaboration and a centralized repair facility on a critical line replacement unit for a major Air Force weapon system. Maintenance data is collected, summarized into probability distributions and used in a discrete event simulation model to examine the impact of changes to the Air Force hierarchical maintenance structure. |
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| An Analytical Approach to Low Observable Maintenance Practices Using Simulation and Marginal Analysis |
Dec 2011 |
11 pages |
| Authors:
Stephanie C Ysebaert; Alan W Johnson; John O Miller; Timothy J Pettit; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF OPERATIONAL SCIENCES
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| The F-22 Raptor is a unique aircraft with many technological advantages and superior capabilities. The aircraft's stealth capability is a function of many design aspects, including coatings that cover the outside of the aircraft and help mitigate radar detection. Maintaining these Low Observable coatings has its own set of challenges to include an inexperienced work force, time consuming procedures, and demanding maneuvers of a fifth generation fighter aircraft. Another challenge ... |
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| F-111 Adhesively Bonded Repair Assessment Program (FABRAP) - Phase 1 Testing, Preliminary Results |
Aug 2011 |
79 pages |
| Authors:
Paul J Callus; Paul Chang; David Dellios; Kelvin J Nicholson; Andrew Rider; Ivan Stoyanovski; Eudora Yeo; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
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| Adhesive bonded repairs are being used for the through-life-support of secondary and tertiary aircraft structure. This technology has not been accepted for application to primary aircraft structure due largely to the lack of a non-destructive inspection technique for, and uncertainty regarding the environmental durability of, adhesive bonds. Over the last twenty five years a large number of adhesive bonded repairs have been applied to the Royal Australian Air Force F-111 ... |
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| Prioritizing Maintenance Human Factors Challenges and Solutions: Workshop Proceedings |
Aug 2011 |
26 pages |
| Authors:
Katrina B Avers; William B Johnson; Joy O Banks; Darin Nei; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROSPACE MEDICAL INST
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| Thirty delegates, mostly from the Federal Aviation Administration's Office of Aviation Safety, but also from the U.S. aviation industry, the National Transportation Safety Board, and Transport Canada, assembled for two days at the Civil Aerospace Medical Institute in Oklahoma City. These leaders in maintenance human factors research met to discuss challenges and prioritize solutions for human factors issues in aviation maintenance. The delegates reviewed international incidents and accidents and corporate ... |
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| Surgical Nondestructive Evaluation (SuNDE) |
Jul 2011 |
66 pages |
| Authors:
Gary Georgeson; Bill Motzer; Paul Rutherford; BOEING CO ST LOUIS MO
|
| This report summarizes the results of the Air Force program, Surgical NDE (SuNDE), and provides recommendations for the development and implementation of SuNDE to relevant limited access inspection applications. The motivation for SuNDE development is derived from the need to reduce costly disassembly and to extend inspection intervals by detecting smaller remote flaws. This report is an assessment of the needs and opportunities for cavity and obscured view inspections. The ... |
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| Enhanced Aircraft Platform Availability Through Advanced Maintenance Concepts and Technologies (Amelioration de la Disponibilite des Plateformes D'Aeronefs par L'Utilisation des Technologies et des Concepts Evolues de Maintenance) |
JUN 2011 |
553 pages |
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
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| This report identifies maintenance/support management and equipment technologies which can improve aircraft platform availability. It contains information from a Workshop of invited specialists held in October 2006 (RTO-MP-AVT-144) and separate research by the AVT-144 Technical Team. Aircraft availability is a key component of military capability and an important measure of the readiness and effectiveness of a force. For military effect, high availability on the flight line must be accompanied by ... |
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| Fatigue Risk Management in Aviation Maintenance: Current Best Practices and Potential Future Countermeasures |
JUN 2011 |
42 pages |
| Authors:
Alan Hobbs; Katrina B. Avers; John J. Hiles; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
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| The unregulated hours and frequent night work characteristic of maintenance can produce significant levels of employee fatigue, with a resultant risk of maintenance error. Fatigue Risk Management Systems (FRMS) are widely used to manage fatigue among flight crew and drivers of commercial vehicles, but comprehensive approaches to fatigue risk management are still uncommon within maintenance organizations. In the wider transport industry, the objective of most FRMS has been to reduce ... |
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| The Effects of Employing HVM on C-130 Aircraft at WR-ALC to Aircraft Availability |
JUN 2011 |
93 pages |
| Authors:
Ronald M. Llantada; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH INTEGRATED LOGISTICS SUPPORT (ILS)
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| The objective of this research is to evaluate the impact of increasing the labor burn rate, one of the High Velocity Maintenance (HVM) core tenets, and the transition of isochronal aircraft inspections from the field to the depots under the Single Maintenance Concept. This study focuses on depot maintenance data from WR-ALC for AFSOC C-130 aircraft to evaluate HVM effectiveness to improve the on-time delivery rate and increase aircraft availability ... |
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| Contingency Response Groups: An Analysis of Maintenance Training |
JUN 2011 |
55 pages |
| Authors:
Brian P. Mayer; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The concept of a Contingency Response Group (CRG) as a "quick reaction force" is still relatively new. With the increasing involvement in humanitarian relief efforts and the increase in civilian aircraft used in these efforts, the proper balance of what aircraft CRG members are being trained and qualified on needs to be reevaluated. This paper is qualitative in nature and uses a case study approach to present the types of ... |
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| Helicopter Maritime Environment Trainer: Maintenance Manual (Simulateur D'Entrainement Virtuel pour Helicoptere Maritime: Manual D'Entretien) |
Jun 2011 |
118 pages |
| Authors:
Leo Boutette; Ken Ueno; Jason Dielschneider; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| The Helicopter Maritime Environment Trainer (HelMET) was developed by Defence R&D Canada - Toronto (DRDC Toronto) for training helicopter pilots to land on the flight deck of a Canadian Patrol Frigate (CPF) in a virtual environment. The HelMET was installed at 12 Wing, Canadian Forces Base (CFB) Shearwater, Nova Scotia, Canada [reference: Summary per document cited in next paragraph]. DRDC Toronto Document: CR2002-028 Atlantis Document: ED997-0000369 titled Helicopter Maritime Environment ... |
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| An Air Force Guide for Effective Meeting Management |
MAY 2011 |
73 pages |
| Authors:
Heather D. Cooley; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The C-130 is a tactical airlifter and has been in steady use for decades in austere deployed locations. The inspection program to ensure its sustainment has faced increasing workload requirements due to structural issues related to heavy use and aging materials. The most in-depth inspection is the Programmed Depot Maintenance (PDM) inspection and is accomplished at two Air Logistics Centers (ALCs). In recent years, both centers have experienced increased maintenance ... |
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| Depot-Level Simulation and Multivariate Analysis on B-1 High Velocity Maintenance |
MAR 2011 |
101 pages |
| Authors:
Florence K. Yee; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| The objective of this thesis is to gain insights on the B-1B depot maintenance operations, with a focus on direct maintenance hours or burn rate, under the implementation of High Velocity Maintenance (HVM). Based on historical depot maintenance data and the current B-1 depot HVM prototype data, a discrete-event simulation model is developed using Arena 12.0. Some United States Air Force supply chain influences, such as manning levels and kitting ... |
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| Air Vehicle Integration and Technology Research (AVIATR). Delivery Order 0002: Condition-Based Maintenance Plus Structural Integrity (CBM+SI) Strategy Development |
NOV 2010 |
167 pages |
| Authors:
Dale Ball; Joe Lougheed; LOCKHEED MARTIN AERONAUTICAL SYSTEMS MARIETTA GA
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| Military aircraft platforms are currently confronted by two pressing issues: increasing maintenance costs and decreasing availability. Nearly 30% of Air Force platform Operations & Support (O&S) costs are for structure inspection and repair. Condition-Based Maintenance plus Structural Integrity (CBM+SI) offers an opportunity to achieve significant platform availability increases and maintenance hour per flight hour decreases. A promising solution to both of these issues is the application and integration of CBM+ ... |
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| Probability Based Integration of Structural Health Monitoring into the Aging Aircraft Sustainment Program |
02 AUG 2010 |
9 pages |
| Authors:
Raphael T. Haftka; Fuh-Gwo Yuan; Nam-Ho Kim; FLORIDA UNIV GAINESVILLE
|
| The research focused on improvements in diagnosis and prognosis of crack detection through extensive use of probabilistic techniques. A unique feature of the research is that it identifies the material properties relevant to damage propagation at the same time that it performs diagnosis and prognosis. As such, it has the potential of turning aircraft into flying fatigue laboratories and contributing to substantial improvements in the accuracy of aircraft digital twins. ... |
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| Fuel Savings through Aircraft Modification: A Cost Analysis |
Jun-2009 |
80 pages |
| Authors:
Ray P Matherne; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| The 2008 National Defense Authorization Act requires the Secretary of the Air Force to task a federally funded research and development center to conduct an engineering analysis on modifying KC-135R and KC-10 tanker aircraft with winglets and submit a report to the congressional defense committees by May 1, 2009. This research summarizes the main issues that decision makers should consider in the investment in a winglet modification program. The factors ... |
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| Evaluation of Air Force Aircraft Maintenance Metrics for Integration into the Expeditionary Combat Support System |
Mar-2009 |
159 pages |
| Authors:
Brian D Waller; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| Implementation of an ERP is a large time and resources consuming endeavor, with many areas the require evaluation and planning. One of these critical areas are Legacy Systems Evaluation and Conversion. This study will explore the transition of 28 current legacy Air Force Maintenance metrics into the ECSS ERP system. Evaluation of these metrics by operational maintenance managers will provide insight into the importance and effectiveness of the current metrics ... |
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| From Aviation Supply and Maintenance Officers to Aviation Logisticians |
20-Feb-2009 |
14 pages |
| Authors:
DanTe' A Jones; MARINE CORPS COMBAT DEVELOPMENT COMMAND QUANTICO VA
|
| Logistics means having the right thing, at the right place, at the right time!1 This definition does not specify a difference between aviation and ground logistics. Marine Corps ground logistics and aviation logistics both work to ensure Marines have assets they need when they need them. The Marine Corps aviation logistics field's officer corps is divided into two separate military occupational specialties (MOS) aviation supply officers (6602) and aviation maintenance ... |
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| Proper Alignment for Flightline Maintenance: Creech Vs. McPeak |
FEB 2009 |
62 pages |
| Authors:
Ray A. Lindsay; AIR WAR COLL MAXWELL AFB AL
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| After personally experiencing four organizational structures impacting flightline maintenance and only five years following a major Air Force reorganization, many Air Force personnel found themselves contemplating another potential realignment in 2008. Again, this realignment placed the reorganization of flightline aircraft maintenance, otherwise known as the aircraft maintenance unit (AMU), as a central consideration. Similar to previous considerations, this issue raised an emotional and controversial debate throughout the Air Force. Many ... |
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| Anticipating Job Aiding and Training Requirements |
Jan-2009 |
77 pages |
| Authors:
Norman Badler; Patrick J Vincent; Scott A Pierce; Dennis J Riechman; Jill Lindsey; Adam Green; NORTHROP GRUMMAN INFORMATION TECHNOLOGY FAIRBORN OH
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| The primary objective of this research effort was to gain a better understanding of current trends (demographic, workforce, technology, etc.) and challenges related to job aiding and training in order to develop the foresight needed to help formulate potential areas for future research. During the course of this effort, the scope of our research and investigations became specifically focused on Air Force technical training, which encompasses training for career fields ... |
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| Challenges and Issues with the Further Aging of U.S. Air Force Aircraft: Policy Options for Effective Life-Cycle Management of Resources |
Jan-2009 |
|
| Authors:
Jean R Gebman; RAND CORP SANTA MONICA CA
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 | Over the next 20 years, the further aging of already-old aircraft will introduce challenges and issues for aircraft operators, including the U.S. Air Force. This report identifies those challenges and issues and explores policy options for addressing them in ways that can contribute to effective life-cycle management of resources. The technical challenges relate to structures, propulsion, and systems. The institutional challenges include limitations on independent verification of fleet status and ... |
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| Squadron Movements and Associated Transportation Problems: An Inner Look into the Process |
18-Dec-2008 |
114 pages |
| Authors:
William J Hollis; Anthony S Estep; Nicholas T Walker; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
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| The purpose of this MBA project is to explore the feasibility of pre-positioning common aviation support equipment onboard aircraft carriers. When called upon to conduct shipboard operations, carrier-based squadrons are currently required to transport their common support equipment between their home station and their assigned aircraft carrier via commercially contracted trucks. The determination of pre-positioning was made by conducting a cost-benefit analysis of purchasing additional support equipment versus the continuation ... |
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| Guide to the Impact Behaviour of Aircraft Instrument Panel Lamp Filaments |
Oct-2008 |
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| Authors:
B Grigson; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
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| In the event of an aircraft experiencing an impact that causes significant structural damage, the examination of lamp filaments form the instrument panel warning and caution system has provided investigators with valuable information regarding the status of the aircraft systems at the time of impact. This report presents the results of lamp tests conducted at medium to high g impact and covers the filament condition prior and post impact, on ... |
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| UMCE-FM: Untethered Motion Capture Evaluation for Flightline Maintenance Support |
01-Jun-2008 |
42 pages |
| Authors:
PENNSYLVANIA UNIV PHILADELPHIA CENTER FOR HUMAN MODELING AND SIMULATION
|
| The purpose of this research was to explore and evaluate the utility of novel motion capture technologies within the Air Force maintenance domain. The primary objective was to determine the potential of untethered motion capture capabilities for real-time human subject motion capture and performance data collection with full-scale physical props. The second objective was to evaluate data collected during maintenance task performance validation for the purpose of instruction generation and ... |
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| Executive Summary Report of Work Accomplished on the Corrosion-Fatigue Assessment Program |
31-Mar-2008 |
27 pages |
| Authors:
Wally Hoppe; Garry Abfalter; Jennifer Pierce; William Braisted; DAYTON UNIV RESEARCH INST (URDI) OH STRUCTURAL INTEGRITY DIV
|
| In June 2003, UDRI was placed on contract, as prime, to lead in an effort to study the effect that corrosion has on the fatigue life of high-strength steels in Navy applications. In September 2005, UDRI was placed under contract to AES to continue the effort begun by the earlier program. In September 2006, UDRI was placed under contract to continue the effort begun under the two previous contracts. The ... |
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| Corrosion-Fatigue Assessment Program |
31-Mar-2008 |
246 pages |
| Authors:
Wally Hoppe; Garry Abfalter; Jennifer Pierce; William Braisted; DAYTON UNIV RESEARCH INST (URDI) OH STRUCTURAL INTEGRITY DIV
|
| In June 2003, UDRI was placed on contract, as prime, to lead in an effort to study the effect that corrosion has on the fatigue life of high-strength steels on Navy applications In September 2005, UDRI was placed under contract to AES to continue the effort begun by the earlier program In September 2006, UDRI was placed under contract to continue the efforts from the two previous contracts. The Navy ... |
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| MARC Data Collection- A Flawed Process |
25 MAR 2008 |
31 pages |
| Authors:
Gary W. Toney; ARMY WAR COLL CARLISLE BARRACKS PA
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| The purpose of this paper is to provide evidence that the Army has not correctly resized the aviation maintenance structure to support transformed aviation units; that the process used to determine current personnel requirements based upon Manpower Requirements Criteria (MARC) data is flawed; and that base line MARC data needs to be revised to correctly reflect the man-power required to properly maintain the OPTEMPO of today's combat aviation brigade. This ... |
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| Improved Navy Maintenance Through Corrosion-Fatigue Assessment Program |
11-Mar-2008 |
237 pages |
| Authors:
Wally Hoppe; DAYTON UNIV RESEARCH INST (URDI) OH STRUCTURAL INTEGRITY DIV
|
| The High-Strength Steel Corrosion-Fatigue Assessment program was designed to ensure reliability and supportability of current and emerging Naval aircraft by providing requisite engineering support to evaluate issues relevant to corrosion-fatigue of aircraft components. In this multi-year, multi-contract program, tools have been developed to assist in the establishment of maintenance options for corroded components. Experimental and analytical tools have been developed to classify corrosion in a manner tied to a reduction ... |
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| In Vitro Toxicity of Aluminum Nanoparticles in Human Keratinocytes |
MAR 2008 |
90 pages |
| Authors:
Stephanie McCormack-Brown; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Nanotechnology promises to be the defining technology of the 21st century. At an annual investment of $1B, it provides significant contributions to manufacturing, medicine, energy conservation, and the environment. Nanoparticles are structures with at least one dimension in the 1 to 100 nanometer (nm) range. DoD and US Air Force interest in aluminum nanoparticles (AL NPs) stems from its ability to enhance combustion jet fuel, thus increasing fuel efficiency. The ... |
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| Financial Challenges and Responsibilities in the Management of the Navy Flying Hour Program at the Squadron Level |
DEC 2007 |
61 pages |
| Authors:
Murat Sarisen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| There have been numerous graduate research projects written about the Navy Flying Hour Program at the Department of Navy (DoN) level on down the chain of Command to the TYCOM level. But there is no research regarding the FHP in terms of how it is done and its affects and consequences at the squadron level. The primary purpose of this professional report is to bring to light the challenges faced ... |
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| Employing Organizational Modeling and Simulation to Deconstruct the KC-135 Aircraft's Programmed Depot Maintenance Flight Controls Repair Cell |
DEC 2007 |
168 pages |
| Authors:
Matthew A. Paskin; Alice W. Trevino; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This research modeled and simulated the KC-135 aircraft's Programmed Depot Maintenance (PDM) Flight Controls Repair Cell to identify improvement opportunities for greater efficiency within the flight controls repair process. PDM is conducted by the 564th Aircraft Maintenance Squadron, 76th Aircraft Maintenance Group, Oklahoma City Air Logistics Center (OC-ALC), Tinker Air Force Base, Oklahoma. The researchers focused on the repair cell's internal formal and informal communication flows and information processing to ... |
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| An Analysis of the Benefits and Savings of the Center of Excellence within the Fleet Readiness Centers |
DEC 2007 |
59 pages |
| Authors:
Philip Deboe; John Goolsby; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Recognizing the need to reduce cost, Naval Air Systems Command (NAVAIR) reorganized the Intermediate and Depot level maintenance structures to form the combined Fleet Readiness Center. By combining Intermediate and Depot facilities, NAVAIR can reduce Aviation Depot Level Repairable (AVDLR) costs by interdicting Beyond Capable Maintenance AVDLR's. NAVAIR further consolidated the Naval Aviation Enterprise by creating Centers of Excellence (COE) at designated FRC's to limit the amount of repair sites ... |
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| An Examination of the Relationship between Usage and Operating and Support Costs for Air Force Aircraft |
01-Sep-2007 |
|
| Authors:
Eric J Unger; RAND CORP SANTA MONICA CA
|
| This research examines the relationship between operating and support (O&S) costs and usage of Air Force aircraft to improve resource allocation. Currently the Air Force uses an average cost metric to forecast costs related to flying hours. Problems arise with the accuracy of the cost per flying hour (CPFH) factors when the relationship between cost and usage is either nonlinear or includes nontrivial fixed costs. Superficially, it may seem reasonable ... |
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| Military Base Closures: Projected Savings from Fleet Readiness Centers Likely Overstated and Actions Needed to Track Actual Savings and Overcome Certain Challenges |
JUN 2007 |
41 pages |
| Authors:
Brian J. Lepore; Michael Kennedy; Avrum I. Ashery; Pat L. Bohan; Grace A. Coleman; Julia C. Matta; Charles W. Perdue; Maria-Alaina I. Rambus; John E. Trubey; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
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| The 2005 Base Realignment and Closure (BRAC) recommendation to establish fleet readiness centers was expected to yield more savings than any other of the 2005 BRAC recommendations. To achieve these savings the Navy plans to integrate civilian depot personnel to complete some repairs at intermediate maintenance departments to reduce aviation maintenance costs. This report, prepared under the Comptroller General authority to conduct evaluations on his own initiative, is one in ... |
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| Experimental and Modeling Damage Limits Study for Straight Ti-3A1-2.5V Tubes |
15-May-2007 |
95 pages |
| Authors:
Mool C Gupta; Charles Lei; Bob Taylor; Michael Yu; Bill Stone; Tom Spidel; Tim Grose; Kevin Woodland; Teh-Hwa Wong; Kan Ni; Yaomin Lin; Reanne Williams; VIRGINIA UNIV CHARLOTTESVILLE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| To insure the safety of the V-22 aircraft over long period of operation, damage limits should be established for Ti alloy hydraulic tubes In a previous report, the damage limit results for straight Ti-3Al-2.5V tubes with outer diameter (OD) of 3/8 inch and tube wall thickness of 0.032 inch were summarized. In this report, we present the fatigue life cycle (internal impulse pressure) test results and give the fatigue life ... |
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| Effects of Using NATEC Services within E-2C and FA-18 Operational Squadrons |
MAR 2007 |
149 pages |
| Authors:
Allen E. Sanford; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The thesis identifies Navy E-2C and FA-18 squadron metrics that are affected by Technical Representative (Tech Rep) Usage from Naval Air Technical and Engineering Service Command (NATEC). Six different databases are identified that contain the following types of metrics: Readiness, Standards and Policy (RS&P), Maintenance and Supply Chain Management (M&SCM); Fleet Readiness Training Plan (FRTP); Financial; Manpower; and Tech Rep Usage. From the databases, twenty-four months of data is collected ... |
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| Micro-Stress Bound Estimate Enabled Optimization of Structural Composite Repair for the Next Generation Aircraft |
28 FEB 2007 |
42 pages |
| Authors:
Endel V. Iarve; Robert Lipton; DAYTON UNIV OH
|
| The completed effort integrated the rigorous microlevel (fiber, matrix, sizing) stress bound recently obtained by Lipton [1,2] under AFOSR sponsorship with the AFRL-developed ply level multibasis spline approximation stress analysis tools [3-5]. A robust multiscale analysis framework was developed and applied within and beyond the scope of the present grant. The developments included extension of the stress bound estimates in heterogeneous materials with periodic microstructure to include residual stress effects ... |
|
| Australian DefenceScience. Volume 15, Number 3, Spring |
Jan-2007 |
|
| Authors:
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION CANBERRA (AUSTRALIA)
|
| CONTENTS: High fire-rate weapon blazing away with success - DSTO has developed a concept demonstrator device with the capability of firing two projectiles from a single gun barrel at very high muzzle velocities almost simultaneously. A hidden property of light that makes the invisible visible - Defence is sponsoring an investigation into a new technology that can sight targets obscured by natural causes such as smoke, mist and turbidity, or ... |
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| Australian DefenceScience. Volume 15, Number 4, Summer |
Jan-2007 |
|
| Authors:
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION CANBERRA (AUSTRALIA)
|
| CONTENTS: A drier Tiger is a healthier flyer - The Army's Tiger Armed Reconnaissance Helicopter (ARH), soon to be permanently based at Robertson Barracks in Darwin, faces a greatly increased threat of corrosion in the wet tropics environment of its new home. DSTO is looking into ways of reducing this threat with dehumidified hangar facilities. ANZACS declared fit for long life at sea - Since ANZAC class frigates first took ... |
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| Programmed Depot Maintenance Capacity Assessment Tool: Workloads, Capacity, and Availability |
2007 |
|
| Authors:
Elvira N. Loredo; Raymond A. Pyles; Don Snyder; RAND CORP SANTA MONICA CA
|
| This monograph describes a model for evaluating the combined capacity of organic (U.S. Air Force owned and operated) and contractor maintenance assets to meet aircraft programmed depot maintenance (PDM) workloads. The PDM Capacity Assessment Tool (PDMCAT) forecasts the average number of aircraft that will be in PDM status each year over several decades, based on the initial number of aircraft in PDM status, the physical capacity of the facility or ... |
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| Naval Aviation Maintenance: A Case Study for Process Improvement |
15-Dec-2006 |
46 pages |
| Authors:
Eric Jafar; Terence N Mejos; Chieh Yang; NAVAL POSTGRADUATE SCHOOL MONTEREY CA GRADUATE SCHOOL OF BUSINESS AND PUBLIC POLICY
|
| This case is divided into two parts: Part A describes the J52-P408 engine repair process prior to the implementation of AIRspeed at the AIMD Naval Air Station, Whidbey Island (NASWI) J52 engine repair shop. Part B discusses the post-implementation of AIRSpeed and the use of Value Stream Mapping (VSM) to eliminate non-value-added processes; the use of which resulted in increased productivity. |
|
| Aircraft Maintenance Intuitive Troubleshooting (AMIT) |
DEC 2006 |
111 pages |
| Authors:
Charles Botello; Johnnie Jernigan; Darryl Stimson; Scott W. Marquardt; David E. Kancler; Christopher K. Curtis; Derrick R. Barthol; Christopher M. Burneka; Vaughan T. Whited; NCI INFORMATION SYSTEMS INC FAIRBORN OH
|
| The Aircraft Maintenance Intuitive Troubleshooting (AMIT) program was a 37-month, 6.3 funded research and development effort sponsored by the Air Force Research Laboratory's Human Effectiveness Directorate, Logistics Readiness Branch (AFRL/HEAL). Its purpose was to research and design an electronic maintenance aid for on-aircraft maintainers as they troubleshot difficult system malfunctions. The goals were to reduce troubleshooting time and increase troubleshooting accuracy, thereby increasing aircraft availability. Program execution occurred in three ... |
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| Innovative Methods for Engine Health Monitoring |
30 NOV 2006 |
68 pages |
| Authors:
C. L. Chen; Z. Pantic-Tanner; H. Millwater; S. Hudak; Y. Huang; P. Cotae; D. Tanner; E. John; K. Chan; X. Wang; TEXAS UNIV AT SAN ANTONIO COLL OF ENGINEERING
|
| The University of Texas San Antonio (UTSA), including Southwest Research Institute, is developing engine health monitoring (EHM) technology that compliments the ongoing and planned research within AFRL. The program consists of three distinct but related task areas that span EHM from a systems engineering level, to a specific damage-based life prediction processor, to a durability assessment of sensing materials. Task 1 is a systems level capstone effort focused on the ... |
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| Impact Location for a Multilayer Transversely Isotropic Plate |
OCT 2006 |
11 pages |
| Authors:
Steven A. Martin; Kumar V. Jata; Samuel J. Kuhr; Enrique A. Medina; NDE COMPUTATIONAL CONSULTANTS DUBLIN OH
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| This paper will address analytical research work performed on impact location in an anisotropic multilayered thermal protection structure. The propagation of elastodynamic waves through the multilayer structure and the possibility that the layers are transversely isotropic are two complications that are addressed. The method used is an extension of classical triangulation based on the use of the fixed geometry of the multilayer plate structure, quasi-longitudinal modes, and the generalized Snell's ... |
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| Probabilistic Risk Assessment: Impact of Human Factors on Nondestructive Evaluation and Sensor Degradation on Structural Health Monitoring (Preprint) |
SEP 2006 |
10 pages |
| Authors:
John C. Aldrin; Enrique A. Medina; Daniel A. Allwine; Mohammed Qadeer Ahmed; Joseph Fisher; Jeremy S. Knopp; Eric A. Lindgren; COMPUTATIONAL TOOLS INC GURNEE IL
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| Managing human factors in nondestructive evaluation is critical to maintain inspection reliability. Reliability of structural health monitoring systems is particularly sensitive to sensor degradation over time. To investigate the impact of these issues, probabilistic models for risk assessment and cost-benefits analysis have been developed. Quantitative studies are presented evaluating the effects of variations in probability of detection associated with human factors, plus in-situ sensor degradation on life cycle measures such ... |
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| The Role of Range and Speed in the 21st Century: Transforming Air Power through Technology. A Systems Study |
JUL 2006 |
22 pages |
| Authors:
Alan H. Epstein; Jonathan Protz; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS
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| A top-down analysis of the cost structure of a U.S. air war was performed with the aim of elucidating the importance of aircraft range to campaign cost. Historically, operations and support costs dominated the cost of an air war due to the large number of sorties required to deliver the large volume of relatively inexpensive, low-precision munitions needed to destroy a specific target. The advent of precision munitions has dramatically ... |
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| Effect of Adhesive Material Properties on Induced Stresses in Bonded Sensors (Preprint) |
JUL 2006 |
10 pages |
| Authors:
Steven A. Martin; James L. Blackshire; NDE COMPUTATIONAL CONSULTANTS DUBLIN OH
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| An analysis of the stresses induced in adhesively bonded sensors from a biaxial stress field in the underlying substrate is presented. Recent Structural Health Monitoring work has looked at using surface bonded sensors to detect and characterize damage in aircraft structures. In addition to the proper design of these systems, it is important that they be able to survive in a sometimes hostile operating environment in terms of weather, vibration, ... |
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Reports by Keyword(s)
AIRCRAFT MAINTENANCE
