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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 41 - 60 of 603 results
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 14 CFR Part 23 Automatic Ground Collision Avoidance System Auto GCAS Certification Roadmap
    14 CFR Part 23 Automatic Ground Collision Avoidance System (Auto GCAS) Certification Roadmap
    LeClair, R ;
    Stone, B
    2024-07-01 | PDF
    Automatic Ground Collision Avoidance System (Auto GCAS) can be integrated on 14 Code of Federal Regulations (CFR) Part 23 general aviation aircraft with existing certified autopilot systems to reduce controlled flight into terrain (CFIT) to below the current mishap rate. To ensure safe and effective Auto GCAS implementation, regulators must assure ...
  • 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 ...
  • DARWIN Roadmap for Cold Dwell Fatigue
    DARWIN® Roadmap for Cold Dwell Fatigue
    Sobotka, James C ;
    Enright, Michael P
    2024-06-01 | PDF
    Cold dwell fatigue (CDF) is a time-dependent process in near-alpha titanium alloys at temperatures below 300°C that involves metal degradation in the presence of creep to produce cracking on low-energy fracture facets in preferentially oriented, hard-alpha grains. It can cause significant reductions in fatigue life, and experience has shown that it ...
  • Measuring the Fire Growth Potential of Combustible Solids Using a Cone Calorimeter Report
    Measuring the Fire Growth Potential of Combustible Solids Using a Cone Calorimeter [Report]
    Lyon, Richard E.
    2024-05-01 | 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 cabin as the flame spread rate, time-to-flashover, or time to incapacitation, respectively. The results are used to indicate the level of passive ...
  • State of the Industry Resin Infusion A Literature Review
    State of the Industry – Resin Infusion: A Literature Review
    Huberty, Wayne ;
    Roberson, Matthew
    2024-05-01 | PDF
    Resin infusion processes, both resin transfer molding (RTM) and its variations, such as vacuum assisted resin transfer molding (VARTM), are poised to be more heavily adopted in transport aerospace applications due to several major advantages. This report investigated industrial applications of resin infusion and provides a general overview of many ...
  • Runway Incursion Mitigation Fiscal Year 2023 Annual Summary Report
    Runway Incursion Mitigation Fiscal Year 2023 Annual Summary Report
    Vitagliano, Lauren ;
    Debban, Steven
    2024-05-01 | PDF
    In fiscal year (FY) 2012, the Federal Aviation Administration (FAA) Office of Airports (ARP) initiated a research study to identify and geographically locate areas at airports with nonstandard taxiway geometry. This research was advanced because an earlier study (Legarreta, 2012) had shown nonstandard taxiway geometries to be associated with a high ...
  • Aircraft Air Quality and Bleed Air Contamination Detection: Engine Stand Tests, Sensor Technologies and Chemical Sampling (Phase 2, Volume 1) [supporting dataset]
    Fox, Richard B ;
    Jones, Byron W
    2024-04-18 | ZIP
    The purpose of this project was to provide a data-driven process to identify sensing technology with good potential for detecting bleed air contamination from engine oil, hydraulic fluid, or deicing fluid. An on-wing test was conducted in February 2022. A test on an engine test bed was conducted in May 2022. Sensors and instruments were identified, ...
    Dataset Supporting Files
  • Experimental Study of the Characteristics of a Hydrogen Flame from a Small Leak
    Experimental Study of the Characteristics of a Hydrogen Flame from a Small Leak
    Kurtanidze, John I
    2024-04-01 | PDF
    With a rising interest in hydrogen-fueled aircraft comes many design and safety concerns. There are many problems to be solved and safety standards and precautions established if aircrafts are going to be equipped with hydrogen. To that end, the objective of this project is to understand the fundamental characteristics of hydrogen flames. More spec ...
  • Integrated Propulsion and Controls for Rotorcraft Phase 2
    Integrated Propulsion and Controls for Rotorcraft – Phase 2
    Collins, Kyle B ;
    Anderson, Richard P
    2024-04-01 | PDF
    This technical report documents research conducted by Embry-Riddle Aeronautical University’s Eagle Flight Research Center team in Phase 2 of the Integrated Propulsion and Controls for Rotorcraft project. The purpose of this research was to build on the progress made during Phase 1 of the project. This involved developing a hardware-validated flight ...
41 - 60 / 603