Federal Aviation Administration March 31, 2006 – Federal Register Recent Federal Regulation Documents

The FAA is issuing this notice to advise the public of a meeting of the Executive Committee of the Aviation Rulemaking Advisory Committee.

The FAA proposes to supersede an existing airworthiness directive (AD) for General Electric Company (GE) CT7-5A2, -5A3, -7A, - 7A1, -9B, -9B1, and -9B2 turboprop engines, with certain part number (P/N) and serial number stage 2 turbine aft cooling plates installed. That AD currently requires a onetime eddy current inspection (ECI) of boltholes in certain P/N stage 2 turbine aft cooling plates. This proposed AD would expand the population of affected CT7 turboprop engine models, but would reduce the number of cooling plates affected. It would also require a onetime ECI of boltholes in certain P/N stage 2 turbine aft cooling plates. This proposed AD results from the manufacturer identifying the affected stage 2 turbine aft cooling plates by serial number. We are proposing this AD to prevent separation of the stage 2 turbine aft cooling plate, resulting in uncontained engine failure and damage to the airplane.

The FAA is issuing this notice to advise the public of a meeting of RTCA Special Committee 147: Minimum Operational Performance Standards for Traffic Alert and Collision Avoidance Systems Airborne Equipment.

This action extends the expiration date of Special Federal Aviation Regulation (SFAR) No. 105 through October 28, 2006. This action is necessary to maintain the reservation system established for unscheduled arrivals at O'Hare International Airport while the FAA completes rulemaking associated with scheduled arrivals at the airport.

This action proposes to revise Class E surface airspace at Kalispell, MT. This action is necessary for the safety of Instrument Flight Rules (FR) aircraft executing Instrument Landing System (ILS) approach procedures to the newly extended runway at Kalispell/Glacier Park International Airport, Kalispell, MT.

The Federal Aviation Administration (FAA) proposes to rule and invites public comment on the release of approximately thirty (30) acres of land at the Lynchburg Regional Airport, Lynchburg, Virginia from all Federal obligations, since the land is no longer needed for airport purposes. Reuse of the land for commercial/light industrial purposes represents a compatible land use. There are no impacts to the Airport and the land is not needed for airport development as shown on the Airport Layout Plan. The proceeds from the disposal of land acquired with Federal grants will be used for land acquisition and construction costs associated with the southerly extension to Runway 4- 22. The proceeds from the disposal of land acquired without Federal grants will be used for Airport operating and capital costs.

The FAA is adopting a new airworthiness directive (AD) for all McDonnell Douglas airplanes identified above. This AD requires a one- time inspection of the aft attach fitting assembly of the spoiler link to determine the part number, and further investigative action and replacement of the assembly with a new or serviceable assembly, if necessary. This AD results from a determination that the holes of certain aft attach fitting assemblies of the spoiler link were not cold-worked during production. We are issuing this AD to prevent fatigue cracking of the aft attach fitting of the spoiler link and consequent failure of the fitting. Failure of the fitting could result in an asymmetrical lift condition and consequent reduced controllability of the airplane.

The FAA is adopting a new airworthiness directive (AD) for all Airbus Model A318-100 and A319-100 series airplanes; Model A320-111 airplanes; and Model A320-200, A321-100, and A321-200 series airplanes. This AD requires repetitive detailed inspections of the trimmable horizontal stabilizer actuator (THSA) attachments for proper clearances, and any crack, damage, or metallic particles; related corrective actions if necessary; and a report of the inspection results to the manufacturer. This AD results from a report that during lab testing to verify the performance of the THSA's secondary load path with a simulated failure of the THSA's primary load path, the secondary load path's nut did not jam (as it was supposed to do). We are issuing this AD to ensure the integrity of the THSA's primary load path, which if failed, could result in latent (undetected) loading and eventual failure of the THSA's secondary load path and consequent uncontrolled movement of the horizontal stabilizer and loss of control of the airplane.