... Corrosion of aircraft structures has plagued the airline industry since the first use of metals in aircraft manufacture. It is costly both in unscheduled downtime and maintenance. The International Air Transport Association (IATA) reported in 1983 that corrosion costs the airlines between $8...

... Fires in three P-3 air craft oxygen systems have occurred: one in the Royal Australian Air Force in 1984 and two in the U.S. Navy in 1998 and 2003. All three fires started in the aluminum manifold and check valve (MCV) assembly and produced similar damages to the aircraft in which they occurred...

... required to optimize and check the actuator loads for so many load conditions, a binning process was used to reduce the number of unique load conditions to less than 50 000. The process is detailed and the effects on the calculated life are discussed. aircraft spectrum fatigue full-scale testing...

... The purpose of this paper is to present an overview of an Airbus' approach regarding fatigue spectra for large commercial aircraft. An accurate load representation is essential to the modern aircraft fatigue optimization process. The effort to develop spectra must be consistent with the efforts...

... Numerous studies have shown that small-crack methodology can be used to predict the total fatigue life of laboratory type (K T = 1 and 3) specimens under variable amplitude loading. Prior to investigating how well this fatigue life prediction capability could be extended to “real” aircraft...

... This paper presents a comprehensive summary of IAR/NRC research on risk assessment of aging aircraft structures in the presence of corrosion and fatigue. Extensive test data, especially for fuselage splices containing corrosion and multiple site fatigue damage (MSD) and coupons cut from service...

... the structure or the testing system. Examples of the use of these features in a full-scale fatigue test of a fighter aircraft wing are provided. aircraft fatigue full-scale testing data acquisition monitoring Roy L. Hewitt I and Arlin Nelson2 Data Trend Monitoring and End Level Verification - Tools...

... Full-scale aircraft structural fatigue tests are extremely complex from a control systems viewpoint. There are usually a large number of actuators with significant interactions between them and control is made more difficult because the load cells usually move with the actuators. A linear state...

... link of a structure. Aircraft-quality bolts made of 4340 steel with a minimum UTS = 1241 MPa (180 ksi) were tested in three-point bend fatigue. Two life prediction methodologies were accessed for bending stress: S-N curves and fracture mechanics. The tensile S-N curve from the Mil-Handbook-5...

... Indoor Air Quality Investigation on CPA aircrafts was investigated by the Cathay Pacific Airways Limited (CPA) and the Hong Kong Polytechnic University (HKPU). The parameters concerned were carbon dioxide (CO 2 ), relative humidity, temperature, carbon monoxide (CO), ozone (O 3 ), sulphur...

... Aircraft air quality incidents are often traced to jet engine oil and/or hydraulic fluid leaking into bleed air used to ventilate the cabin. These contaminants can be subjected to temperatures in excess of 500°C. Exposed flight crew members have reported symptoms including dizziness, nausea...

... the aircraft and to evaluate other factors that could affect the comfort of the aircraft occupants. Parameters measured include: volatile and semivolatile organic compounds, aldehydes, carbon dioxide, carbon monoxide, oxygen, relative humidity, temperature, and airflow. The airline evaluated the test results...

... A questionnaire survey on evaluation of in-flight health and comfort of cabin crew was investigated between September 1996 to March 1997. One hundred eighty-five questionnaires were completed by the cabin crew. Overall comfort on the aircraft was acceptable and adequate. Important air quality...

... Full-scale aircraft structural fatigue tests are extremely complex, not only in terms of the test definition and implementation, but also from the control systems viewpoint. The load spectra that these tests are subjected to are also becoming more complex as manufacturers and certifying...

... Aviation industry demand for continuous safety improvement in the face of trends toward increasing service life of aircraft and cost control necessitates stronger prevention and control measures to avoid the likelihood of structural failures linked to widespread damage involving corrosion...

... The development of computerized load processing techniques for application to a full-scale fatigue test of the aft fuselage and empennage of a Canadian Forces CT-114 (Tutor) aircraft is described. The procedures used to select significant end points from the flight loads and to eliminate...

... In 1988, inspectors discovered widespread cracking in the main landing gear actuator support beam in a U.S. Navy fighter aircraft. Fractography confirmed metal fatigue as the cause. The beam was made of D6AC steel, a high-strength material. A flange with a small radius behind the attachment lug...

... A design study to determine the viability of a stub-blade wing joint for HALE (high-altitude, long-endurance) aircraft is presented. The resulting wing joint design uses advanced composite materials and is capable of carrying moderately high bending, shear, and torsional loads. The stub-blade...

... (Nationaal Lucht- en Ruimtevaartlaboratorium, The Netherlands); RAE (Royal Aircraft Establishment, Great Britain); Rolls-Royce (Great Britain) and SNECMA (Société Nationale ďEtude et de Construction de Moteurs ďAviation, France); RWTH (Rheinisch-Westfälische Technische Hochschule Aachen, West Germany...

... This paper briefly reviews the history behind the incentives for the use of automobile gasoline in small aircraft powered by engines rated for 80-octane fuel. Data that forms the basis for this paper is from the Federal Aviation Administration (FAA) records in Oklahoma City covering fuel...