Airworthiness Directives; Maryland Air Industries, Inc., Model Fairchild F-27 and FH-227 Series Airplanes
We propose to adopt a new airworthiness directive (AD) for all Maryland Air Industries, Inc., Model Fairchild F-27 and FH-227 series airplanes. This proposed AD would require operators to modify their airplanes and revise their inspection or maintenance programs to incorporate instructions for maintenance and inspection of the fuel tank systems, as appropriate, by December 16, 2008, using information developed in accordance with SFAR 88. This proposed AD results from fuel system safety reviews done on similar airplane models in accordance with SFAR 88. These safety reviews identified potential unsafe conditions on Model Fairchild F-27 and FH-227 series airplanes for which the type certificate holder, Maryland Air Industries, Inc., has not conducted SFAR 88 safety reviews, has not provided corrective actions, and does not plan to do so. We are proposing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.
Proposed Establishment and Revocation of Class E Airspace; Lake Havasu, AZ
This action proposes to establish Class E airspace at the new Lake Havasu City Airport, Lake Havasu, AZ. Additional controlled airspace is necessary to accommodate aircraft using VHF Omni- Directional Radio Range/Distance Measuring Equipment (VOR/DME) Global Positioning System (GPS) Standard Instrument Approach Procedure (SIAP) at Lake Havasu City Airport, Lake Havasu, AZ. This action also would revoke Class E airspace at the old Lake Havasu Airport, Lake Havasu, AZ, as that airport has been abandoned. The FAA is proposing this action to enhance the safety and management of aircraft operations at Lake Havasu City Airport, Lake Havasu, AZ.
Revocation of Class E Airspace; Luke AFB, Phoenix, AZ
This action will revoke Class E airspace at Luke AFB, Phoenix, AZ. The United States Air Force (USAF) is closing the airport to Instrument Flight Rules (IFR) operations when the Air Traffic Control Tower (ATCT) is closed.
Establishment of Class E Airspace; Carson City, NV
This action will establish Class E airspace at Carson City, NV. Controlled airspace is necessary to accommodate aircraft using a new Area Navigation (RNAV) Global Positioning System (GPS) Standard Instrument Approach Procedure (SIAP) at Carson City Airport, Carson City, NV. This will improve the safety of Instrument Flight Rules (IFR) aircraft executing the new RNAV GPS SIAP at Carson City Airport, Carson City, NV.
Airworthiness Directives; Boeing Model 737-300, -400, and -500 Series Airplanes
We are adopting a new airworthiness directive (AD) for all Boeing Model 737-300, -400, and -500 series airplanes. This AD requires inspecting to determine if certain carriage spindles are installed, repetitive inspections for corrosion and indications of corrosion on affected carriage spindles, and if necessary, related investigative action and corrective action. This AD also provides optional terminating action. This AD results from a report of corrosion found on carriage spindles that are located on the outboard trailing edge flaps. We are issuing this AD to detect and correct corrosion of the carriage spindle, which could result in fracture. Fracture of both the inboard and outboard carriage spindles, in the forward ends through the large diameters, on a flap, could adversely affect the airplane's continued safe flight and landing.
Reduction of Fuel Tank Flammability in Transport Category Airplanes
This final rule amends FAA regulations that require operators and manufacturers of transport category airplanes to take steps that, in combination with other required actions, should greatly reduce the chances of a catastrophic fuel tank explosion. The final rule does not direct the adoption of specific inerting technology either by manufacturers or operators, but establishes a performance-based set of requirements that set acceptable flammability exposure values in tanks most prone to explosion or require the installation of an ignition mitigation means in an affected fuel tank. Technology now provides a variety of commercially feasible methods to accomplish these vital safety objectives.