Federal Aviation Administration April 26, 2010 – Federal Register Recent Federal Regulation Documents

Airworthiness Directives; The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER Series Airplanes
Document Number: 2010-9692
Type: Rule
Date: 2010-04-26
Agency: Federal Aviation Administration, Department of Transportation
The FAA is superseding an existing airworthiness directive (AD) that applies to all The Boeing Company Model 737-600, -700, -700C,
Proposed Establishment of Class E Airspace; Bryce Canyon, UT
Document Number: 2010-9614
Type: Proposed Rule
Date: 2010-04-26
Agency: Federal Aviation Administration, Department of Transportation
Airworthiness Standards; Rotor Overspeed Requirements
Document Number: 2010-9588
Type: Proposed Rule
Date: 2010-04-26
Agency: Federal Aviation Administration, Department of Transportation
The FAA proposes to amend the aircraft turbine engine rotor overspeed type certification standards. This action would establish uniform rotor overspeed design and test requirements for aircraft engines and turbochargers certificated by the FAA and the European Aviation Safety Agency (EASA). The proposed rule would also establish uniform standards for the design and testing of engine rotor parts in the United States and in Europe, eliminating the need to comply with two differing sets of requirements. The proposed rule would improve safety by clarifying existing overspeed requirements for aircraft turbine engine rotor parts.
Airworthiness Directives; Bombardier, Inc. Model DHC-8-200 and DHC-8-300 Series Airplanes
Document Number: 2010-9573
Type: Proposed Rule
Date: 2010-04-26
Agency: Federal Aviation Administration, Department of Transportation
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: During a recent production fuel system test, it was found that all three flapper valves located in each collector tank did not conform to the design requirements, due to the fact that a valve spring was installed on the flapper hinge pin. This valve spring should have been removed prior to installation of the valves. With the valve spring installed, the flapper valve is held closed by the valve spring, preventing gravity feed. In the event of scavenge system failure, the collector tank fuel level can no longer be maintained, potentially leading to an in-flight engine shutdown.
Airworthiness Directives; McDonnell Douglas Corporation Model MD-90-30 Airplanes
Document Number: 2010-9572
Type: Proposed Rule
Date: 2010-04-26
Agency: Federal Aviation Administration, Department of Transportation
We propose to adopt a new airworthiness directive (AD) for certain Model MD-90-30 airplanes. This proposed AD would require inspecting for corrosion of the retract cylinder support fitting for the main landing gear (MLG) and the mating bore for the support fitting in the MLG trunnion fitting and performing corrective actions if necessary, and replacing cadmium-plated retract cylinder support bushings and bearings. This proposed AD results from reports of the retract cylinder support fitting for the MLG failing during gear extension and subsequently damaging the hydraulic system. We are proposing this AD to prevent corrosion and damage that could compromise the integrity of the retract cylinder support fitting for the MLG, which could adversely affect the airplane's safe landing.