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FAA William J. Hughes Technical Center for Advanced Aerospace

rosaP Repository & Open Science Access Portal

Technical reports, Tech Notes, and articles that document the FAA’s applied research, engineering, testing and evaluation, and resulting scientific solutions addressing current and future air transportation challenges in collaboration with industry, academia, and other government partners. For more content, visit the FAA Technical Library https://www.faa.gov/about/office_org/headquarters_offices/ang/library/. Bookmark this collection:https://rosap.ntl.bts.gov/collection_faa_tl or https://doi.org/10.21949/1530830.

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Showing 61 - 80 of 1033 results
  • Field Validation of the IndoorOutdoor Method for Measurement of Noise Reduction
    Field Validation of the Indoor-Outdoor Method for Measurement of Noise Reduction
    Sharp, Ben ;
    Cox, Eric
    2025-01-01 | PDF
    The Federal Aviation Administration’s (FAA) Airport Improvement Program (AIP) handbook outlines guidance for the funding of noise mitigation projects and the accuracy of existing noise reduction measurements of a structure. Prior research by the FAA to develop best practices for measuring the aircraft noise reduction of building façades resulted in ...
  • Aircraft Air Quality and Bleed Air Contamination Detection OnWing Tests Sensor Technologies and Chemical Sampling Phase 2 Volume 2
    Aircraft Air Quality and Bleed Air Contamination Detection; On-Wing Tests, Sensor Technologies, and Chemical Sampling (Phase 2, Volume 2)
    Fox, Richard B ;
    Jones, Byron W
    2025-01-01 | PDF
    The purpose of this project was to provide a data driven process to identify sensor technologies with the potential for detecting and identifying low levels of contaminants that may occasionally be present in aircraft engine bleed air supplies. Bleed air from a ground-based aircraft propulsion engine and an auxiliary power unit (APU) were used to s ...
  • Liion Battery Safety under HighSpeed Impact Diagnosis Prognosis and Risk Mitigation
    Li-ion Battery Safety under High-Speed Impact: Diagnosis, Prognosis and Risk Mitigation
    Kumar, Jitendra
    2025-01-01 | PDF
    Lithium-ion batteries (LIBs) are critical to the early adoption of electrified small aircraft because they can provide the required energy, power, and cycle life. However, safety is still a concern, especially in dangerous situations like aircraft crashes or operations in harsh conditions. If damaged, the battery can release stored energy fast, lea ...
  • Electric Vertical Takeoff and Landing eVTOL Downwash and Outwash Surveys
    Electric Vertical Takeoff and Landing (eVTOL) Downwash and Outwash Surveys
    Muia, Maria J ;
    Stanley, Joshua
    2024-12-01 | PDF
    As part of the Federal Aviation Administration’s (FAA) effort to establish vertiport design guidance for facilities intended to accept powered lift and special class rotorcraft, it is of growing importance to determine the risk factors related to vertical takeoff and landing (VTOL) operations and how to mitigate them. The airflow generated from the ...
  • Evaluation Of Novel VSTOL Aircraft Pilot Interface Concepts Version 115
    Evaluation Of Novel V/STOL Aircraft Pilot Interface Concepts — Version 1.15
    Feary, Michael ;
    Kaneshige, John
    2024-12-01 | PDF
    This report documents a response to a request from the FAA UAS Integration Office to provide recommendations for candidate methods for evaluating the airworthiness of a broad range of new aircraft concepts. The UAS Integration Office is facing an unprecedented diversity of applicant aircraft and automation configurations in aviation segments genera ...
  • Cold Dwell Fatigue of Titanium Alloys History Current State and Aviation Industry Perspective Supporting Software
    Cold Dwell Fatigue of Titanium Alloys: History, Current State, and Aviation Industry Perspective [Supporting Software]
    Pilchak, Adam ;
    Fox, Kate
    2024-11-13 | ZIP
    This report summarizes the current state of understanding related to cold dwell fatigue (CDF) of titanium alloys, which is a failure mechanism that can lead to uncontained failure of rotating components. Jet engine manufacturers have brought forward their collective field and spin rig experience related to CDF and coupled it with a thorough literat ...
  • Bonded Repairs to Composite Wing Panel Structure Phase 4 Feasibility Study of Panels with FiberOriented Scarf Repairs
    Bonded Repairs to Composite Wing Panel Structure: Phase 4, Feasibility Study of Panels with Fiber-Oriented Scarf Repairs
    Labik, Tim M ;
    Chadha, Reewanshu
    2024-11-01 | PDF
    The Federal Aviation Administration (FAA) and The Boeing Company have investigated safety and structural integrity issues of bonded repair technology. Efforts are focused on testing and analyzing bonded repairs to 40-in x 24-in flat carbon fiber-reinforced composite panels representative of wing skin using the Aircraft Beam Structural Test (ABST) f ...
  • Design Analysis and Test Development of FullScale Fuselage Test Panels to Assess Emerging Metallic Structures Technologies
    Design, Analysis, and Test Development of Full-Scale Fuselage Test Panels to Assess Emerging Metallic Structures Technologies
    Kulak, Michael ;
    Bakuckas, John Jr.
    2024-11-01 | PDF
    The aircraft industry is striving to improve structural performance and reduce costs in fabrication, operation, and maintenance by introducing advanced designs/materials in conjunction with advanced manufacturing/assembly technologies. Collectively these technologies are referred to as Emerging Metallic Structures Technologies (EMST). Prior tests b ...
  • Investigation of Certification Considerations for Distributed Electric Propulsion DEP Aircraft 2024
    Investigation of Certification Considerations for Distributed Electric Propulsion (DEP) Aircraft [2024]
    McKillip, R. Jr. ;
    Wachspress, D
    2024-10-01 | PDF
    Efforts from a multi-year investigation examining the use of estimation of remaining vehicle control power margins and external environmental disturbances for distributed electric propulsion (DEP) vehicles as a contributor for vehicle certification are described. This study combines simulation of DEP aircraft with experimental testing of representa ...
  • Analysis of Granular BaseSubbase in Airport Pavements Using Embedded Sensors
    Analysis of Granular Base/Subbase in Airport Pavements Using Embedded Sensors
    Tutumluer, Erol ;
    Kang, Mingu
    2024-09-01 | PDF
    This project investigates the modulus and deformation behavior of granular base/subbase layers in airport pavements using three types of embedded sensors: bender element (BE) field sensors, coil sensors, and pressure cells. These sensors were installed in multiple test items at the Federal Aviation Administration’s Construction Cycle 9 (CC9) of the ...
  • Cold Dwell Fatigue of Titanium Alloys History Current State and Aviation Industry Perspective
    Cold Dwell Fatigue of Titanium Alloys: History, Current State, and Aviation Industry Perspective
    Pilchak, Adam ;
    Fox, Kate
    2024-09-01 | PDF
    This report summarizes the current state of understanding related to cold dwell fatigue (CDF) of titanium alloys, which is a failure mechanism that can lead to uncontained failure of rotating components. Jet engine manufacturers have brought forward their collective field and spin rig experience related to CDF and coupled it with a thorough literat ...
  • InService Performance of Concrete Airport Pavements Constructed Using State Highway Specifications
    In-Service Performance of Concrete Airport Pavements Constructed Using State Highway Specifications
    Peshkin, David G. ;
    Quasem, Tanvir
    2024-09-01 | PDF
    The Federal Aviation Administration (FAA) Reauthorization Act of 2018, Section 136 requires the FAA to allow the use of state highway specifications for airfield pavement construction at non-primary airports serving aircraft with a gross weight less than 60,000 lb if requested by the state. To confirm that state highway specifications provide an ac ...
  • Small Unmanned AircraftBased Foreign Object Debris Detection on Airport Surfaces
    Small Unmanned Aircraft-Based Foreign Object Debris Detection on Airport Surfaces
    Shaffer, Logan ;
    Hall, David
    2024-09-01 | PDF
    Foreign Object Debris (FOD) can create significant safety implications for aircraft and personnel and is a continuous concern in the airport environment. The FAA Airport Technology Research and Development Branch conducted a research effort to explore the feasibility and maturity of using commercially available small unmanned aircraft systems (sUAS ...
  • A State of Charge Analysis of 12 Lithium Ion Batteries 128 Volt Previously Shipped on Aircraft
    A State of Charge Analysis of 12 Lithium Ion Batteries (12.8 Volt) Previously Shipped on Aircraft
    Keslar, Daniel
    2024-09-01 | PDF
    The transportation of lithium batteries is heavily regulated. UN 3480, lithium-ion batteries (batteries not packed with or contained within equipment) are forbidden on passenger aircraft and cannot exceed 30% state of charge (SoC) when transported on cargo aircraft. In March 2024, two packages containing lithium-ion cells (UN3480) started to smolde ...
  • Enhancing Pavement Assessment with Dynamic Backcalculation A Dynamic Finite Element Approach
    Enhancing Pavement Assessment with Dynamic Backcalculation: A Dynamic Finite Element Approach
    Hajj, Elie Y ;
    Skaff, Rami
    2024-08-01 | PDF
    The Heavy Weight Deflectometer(HWD)/Falling Weight Deflectometer (FWD) plays a crucial role in assessing pavement’s structural condition. It consists of applying an impulse load to simulate a moving wheel and measuring pavement surface deflections. Pavement variables, such as moduli, are determined through backcalculation, which involves a forward ...
  • Airport Pavement MultipleEvent Roughness Detection and Evaluation
    Airport Pavement Multiple-Event Roughness Detection and Evaluation
    Gerardi, Tony ;
    Gerardi, Michael
    2024-08-01 | PDF
    Airport pavements are critical to American commerce. Like all structures, these pavements are susceptible to wear and damage through use and external forces, these factors can cause costly repairs and maintenance to keep the pavement functional and safe to use. The Federal Aviation Administration (FAA) has a number of Advisory Circulars that act as ...
  • Evaluation of SystemTheoretic Process Analysis STPA for Improving Aviation Safety
    Evaluation of System-Theoretic Process Analysis (STPA) for Improving Aviation Safety
    Thomas, John P ;
    Van Houdt, John G
    2024-07-01 | PDF
    This report summarizes the results of a joint effort by civil aviation authorities to learn System-Theoretic Process Analysis (STPA) and evaluate its applicability to aviation safety including safety management, aircraft development, safety assessment, and certification. Subject matter experts (SMEs) from FAA, EASA, ANAC, ICAO, and NASA participate ...
  • Qualification of Additively Manufactured Material Extrusion Thermoplastic and Lessons Learned
    Qualification of Additively Manufactured Material Extrusion Thermoplastic and Lessons Learned
    Tomblin, John ;
    Andrulonis, Rachael
    2024-07-01 | PDF
    Wichita State University (WSU) - National Institute for Aviation Research (NIAR) completed an initial additive manufacturing research project under the Federal Aviation Administration’s (FAA) Joint Advanced Materials and Structures (JAMS) program between 2016 and 2019. The project focused on the development of a framework for the qualification of p ...
  • Determining the Equivalent Thermal Gradient for Rigid Pavements at the National Airport Pavement Test Facility
    Determining the Equivalent Thermal Gradient for Rigid Pavements at the National Airport Pavement Test Facility
    Offenbacker, Daniel ;
    Brill, David R
    2024-07-01 | PDF
    In recent years, the Federal Aviation Administration (FAA) has focused on identifying and quantifying corner breaking in rigid airport pavements. Prior research studies at the FAA National Airport Pavement Test Facility (NAPTF) have shown premature corner breaks that were not anticipated during design. The FAA has since attributed the corner breaks ...
  • Measuring the Fire Growth Potential of Combustible Solids Using a Cone Calorimeter
    Measuring the Fire Growth Potential of Combustible Solids Using a Cone Calorimeter
    Lyon, Richard E.
    2024-07-01 | PDF
    The fire growth rate of interior linings, furnishings, and construction materials is measured in full-scale fire tests such as the ASTM E84 Steiner Tunnel, the ISO 9705 room fire, and a passenger aircraft fuselage as the flame-spread rate, time-to-flashover, or time to incapacitation, respectively. The results are used to indicate the level of pass ...
61 - 80 / 1033