The Federal Register

Airworthiness Directives; BAE Systems (Operations) Limited (Jetstream) Model 4101 Airplanes

Mon, Jun 9 2008 11:00:00 GMT

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:

Resulting from the assessment of fuel tank wiring installations required by SFAR 88 (Special Federal Aviation Regulation 88) and equivalent JAA/EASA (Joint Aviation Authorities/European Aviation Safety Agency) policy, BAE Systems identified * * * features in the Jetstream 4100 where the need for design changes was apparent. * * *

Internal fuel tank wiring chafing damage, if not corrected, could lead to ignition of fuel vapours and subsequent fuel tank explosion.
* * * * *
The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

Airworthiness Directives; Boeing Model 737-600, -700, -800, and - 900 Series Airplanes

Mon, Jun 9 2008 11:00:00 GMT

We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 737600, 700, 800, and 900 series airplanes. This proposed AD would require installation of hot short protector (HSP) support brackets and equipment for the fuel quantity indicating system (FQIS) fuel densitometer and other specified actions as applicable. This proposed AD would also require a revision to the Airworthiness Limitations (AWLs) section of the Instructions for Continued Airworthiness to incorporate AWL No. 28AWL07. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent the center tank fuel densitometer from overheating and becoming a potential ignition source inside the center fuel tank, which, in combination with flammable fuel vapors, could result in a center fuel tank explosion and consequent loss of the airplane.

Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) Airplanes; CL-600-2D15

Mon, Jun 9 2008 11:00:00 GMT

During a predelivery flight of a CL6002C10 aircraft, the AC essential bus did not come online following deployment of the Air Driven Generator (ADG). Following investigation, it was determined that a specific batch of contactors in the ADG Power Center (ADGPC) is susceptible to failure due to low contact pressure. * * * The unsafe condition is malfunction of the emergency AC generation and control system that supplies emergency AC power to essential flight instruments, including the flap and slat system, pitch trim system, and hydraulic pump 3B. Loss of essential flight instruments could prevent continued safe flight and landing of the airplane. The proposed AD

Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), Model CL-600-2D15

Mon, Jun 9 2008 11:00:00 GMT

We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. 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:

Bombardier Aerospace has completed a system safety review of the aircraft fuel system against fuel tank safety standards * * *. [A]ssessment showed that supplemental maintenance tasks [for the fuel tank wiring harness installation, and the hydraulic system No. 3 temperature transducer, among other items] are required to prevent potential ignition sources inside the fuel system, which could result in a fuel tank explosion. * * *
The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

Airworthiness Directives; EADS SOCATA Model TBM 700 Airplanes

Mon, Jun 9 2008 11:00:00 GMT

A rupture of the alternator and vapour cycle cooling system pulley drive assembly has reportedly been found. Such a failure could lead to the loss of the alternator and vapour cycle cooling systems and could also cause mechanical damage inside the powerplant compartment.

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

Airworthiness Directives; Pilatus Aircraft Ltd. Model PC-6 Airplanes

Mon, Jun 9 2008 11:00:00 GMT

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing
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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:

This Airworthiness Directive (AD) is prompted due to the discovery of loose selflocking stop nuts Part Number (P/N) 938.07.65.105 in the tail landing gear fastener assemblies of some PC6 aircraft.

It is believed that this occurrence could also exist in other fastener assemblies using nuts P/N 938.07.65.105 at various identified locations in the aircraft.

If left uncorrected, the identified assemblies may become loose and not function as designed and could lead to hazardous situations.

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

FAA Approval of Noise Compatibility Program 14 CFR Part 150; Port Columbus International Airport, Columbus, OH

Mon, Jun 9 2008 11:00:00 GMT

The Federal Aviation Administration (FAA) announces its findings on the noise compatibility program (NCP) submitted by the Columbus Regional Airport Authority (CRAA) under the provisions of 49 U.S.C. Sections 47501, et seq. (the Aviation Safety and Noise Abatement Act, hereinafter referred to as ``the Act'') and 14 CFR Part 150 (Part 150). These findings are made in recognition of the description of Federal and nonfederal responsibilities in Senate Report No. 9652 (1980). On December 5, 2007 the FAA determined that the noise exposure maps submitted by the CRAA under Part 150 were in compliance with applicable requirements. On May 19, 2008, the FAA approved the Port Columbus International Airport noise compatibility program updates. Twentyone (21) measures were approved or approved as voluntary. Four (4) measures required no action. Two (2) program elements related to new or revised flight procedures for noise abatement that were proposed by CRAA.

Air Traffic Procedures Advisory Committee

Mon, Jun 9 2008 11:00:00 GMT

The FAA is issuing this notice to advise the public that a meeting of the Federal Aviation Administration Air Traffic Procedures Advisory Committee (ATPAC) will be held to review present air traffic control procedures and practices for standardization, revision, clarification, and upgrading of terminology and procedures.