Federal Aviation Administration March 27, 2012 – Federal Register Recent Federal Regulation Documents

We propose to adopt a new airworthiness directive (AD) for all Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes. This proposed AD was prompted by a design review which revealed the absence of electrical insulation material between a wing or integral center wing tank (ICWT) fuel quantity indication system (FQIS) probe and the bottom of the tank structure. This condition, if not corrected, could, under certain conditions, result in an ignition source in the tank vapor space, which could result in a fuel tank explosion and consequent loss of the airplane. This proposed AD would require, for all airplanes, applying sealant below the FQIS probes in the wing tanks; and for certain airplanes, applying sealant below the FQIS probes in the ICWT. This proposed AD would also require revising the aircraft maintenance program by revising the fuel airworthiness limitations and incorporating critical design configuration control limitations (CDCCLs). We are proposing this AD to prevent an ignition source in the tank vapor space, which could result in a fuel tank explosion and consequent loss of the airplane.

This document provides a statement of FAA policy concerning the required use of the Aviation Environmental Design Tool version 2a (AEDT 2a) to analyze noise, fuel burn, and emissions for FAA air traffic airspace and procedure actions where the study area is larger than the immediate vicinity of an airport, incorporates more than one airport, or includes actions above 3,000 feet above ground level (AGL). The policy statement is intended to ensure consistency and quality of analysis performed to assess noise, fuel burn, and emissions impacts of such actions under the National Environmental Policy Act of 1969 (NEPA), as amended, 42 United States Code (U.S.C.) Sec. Sec. 4321 et seq.

We propose to adopt a new airworthiness directive (AD) for all Boeing Model 747-100, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400F, and 747SR series airplanes. This proposed AD was prompted by reports of broken and damaged latch pin retention bolts of the main deck side cargo door (MDSCD), latch pin migration, and broken latch pin fittings. This proposed AD would require various repetitive inspections of the MDSCD latch pin fittings, measuring the latch pin, and related investigative and corrective actions if necessary; and modifying the latch pin fittings and installing new latch pins and latch pin fasteners. We are proposing this AD to prevent loss of the cargo door and rapid depressurization of the airplane.

This action amends Class E airspace at Lamar Municipal Airport, Lamar, CO. Decommissioning of the Lamar Tactical Air Navigation System (TACAN) has made this action necessary for the safety and management of Instrument Flight Rules (IFR) operations at the airport. This action also adjusts the geographic coordinates of the airport.