Federal Aviation Administration October 7, 2008 – Federal Register Recent Federal Regulation Documents

This action proposes to establish Class E airspace at South Texas International Airport, Edinburg, TX. Controlled airspace is necessary to accommodate Standard Instrument Approach Procedures (SIAP) at South Texas International Airport, Edinburg, TX. The FAA is taking this action to enhance the safety and management of Instrument Flight Rules (IFR) aircraft operations at South Texas International Airport.

We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 727 airplanes. This proposed AD would require, among other actions, installing new ground fault interrupter (GFI) relays for the main fuel tanks and the auxiliary fuel tank pumps. This proposed AD also would require revising the FAA-approved maintenance program to incorporate new Airworthiness Limitations (AWLs) for the GFI of the boost pumps and for the uncommanded on system for the auxiliary fuel tank pumps. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent an electrical fault in the fuel pump system, which might cause a connector or end cap to burn through and a subsequent fire or explosion inside the fuel pump or wing spar area. We are also proposing this AD to prevent uncommanded operation of the auxiliary fuel tank pumps, which can cause them to run dry. This condition will increase pump temperature and could supply an ignition source to fumes in the fuel tank, which can result in a consequent fire or explosion.

We are adopting a new airworthiness directive (AD) for certain Hawker Beechcraft Corporation Model BAe.125 series 800A (including C- 29A and U-125) airplanes, and Hawker Beechcraft Model Hawker 800XP airplanes. This AD requires doing an inspection to determine the serial number and part number on the main landing gear (MLG) upper casing, and replacing the MLG assembly with a serviceable MLG assembly if necessary. This AD results from a report indicating that the MLG casings have received improper hydrogen embrittlement relief. We are issuing this AD to prevent a fracture of the MLG casings and a collapse of the affected MLG, which could adversely affect the airplane's continued safe flight and landing.