Federal Aviation Administration November 29, 2011 – Federal Register Recent Federal Regulation Documents

We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. ALF502L-2C, ALF502R-3, ALF502R-3A, ALF502R-5, LF507-1F, and LF507-IH turbofan engines. This AD requires removing from service certain second stage high pressure compressor (HPC2) discs. This AD was prompted by a report of cracks found in an HPC2 disc during routine inspection. We are issuing this AD to prevent the affected discs from fracturing before reaching the currently published life limit. A disc fracture could result in an uncontained failure of the disc and damage to the airplane.

This action establishes Class E airspace for Nashville, AR, to accommodate new Area Navigation (RNAV) Standard Instrument Approach Procedures at Howard County Airport. The FAA is taking this action to enhance the safety and management of Instrument Flight Rule (IFR) operations at the airport.

This action amends Class E airspace for Winters, TX. Decommissioning of the Winters non-directional beacon (NDB) and cancellation of the NDB Standard Instrument Approach Procedure (SIAP) at Winters Municipal Airport, Winters, TX, as well as the addition of new area navigation (RNAV) SIAPs, has made this action necessary to enhance the safety and management of Instrument Flight Rule (IFR) operations at the airport.

This action amends Class E airspace for Ardmore, OK. Decommissioning of the Arbuckle non-directional beacon (NDB) and cancellation of the NDB Standard Instrument Approach Procedure (SIAP) at Ardmore Municipal Airport, Ardmore, OK, as well as the addition of new area navigation (RNAV) SIAPs, has made this action necessary to enhance the safety and management of Instrument Flight Rule (IFR) operations at the airport. This action also updates the geographic coordinates of the airport.

We are adopting a new airworthiness directive (AD) for certain Gulfstream Aerospace Corporation Model GV and GV-SP airplanes. This AD was prompted by notification from the airplane manufacturer that the third fire extinguisher bottle is mounted in a small-fragment impact zone. This AD requires inspecting to determine whether a third Halon fire extinguisher bottle is installed in the auxiliary power unit (APU) fragment impact zone, revising the limitations section of the airplane flight manual to add restrictions for APU usage for certain airplanes having a third fire extinguisher bottle, and removing the third fire extinguisher bottle from certain airplanes. We are issuing this AD to prevent penetration of the bottle by fragments released due to a failure of the APU rotor system. The bottle could rupture and cause substantial damage to primary airframe structure and primary flight controls.

We are superseding an existing airworthiness directive (AD) that applies to all BAE SYSTEMS (Operations) Limited Model BAe 146- 100A, -200A, and -300A airplanes; and Model Avro 146-RJ70A, 146-RJ85A, and 146-RJ100A airplanes. This 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: * * * * *

We are adopting a new airworthiness directive (AD) for certain Model DC-10-10, DC-10-10F, and MD-10-10F airplanes. This AD was prompted by reports of three instances of fuel leaks in the lower cap splice of the wing rear spar at station Xors=409. Investigation revealed the fuel leak was due to a crack in the lower cap. If not corrected, this condition could result in fuel leaks or cracking of the lower wing skin and structure, causing possible inability of the structure to sustain the limit load and adversely affecting the structural integrity of the airplane. This AD requires repetitive inspections for cracking on the lower cap of the rear spar of the left and right wings between stations Xors=417 and the outboard edge of the lower cap splice of the wing rear spar at station Xors=400; temporary and permanent repairs if necessary; and repetitive inspections of repaired areas, and corrective actions if necessary. We are issuing this AD to correct the unsafe condition on these products.