Airworthiness Directives; The Boeing Company Airplanes
We are revising an earlier proposed airworthiness directive (AD) for all The Boeing Company Model 777-200, -200LR, -300, and -300ER series airplanes. That supplemental notice of proposed rulemaking (SNPRM) proposed to require revising the maintenance program to incorporate a revision to the Airworthiness Limitations Section of the maintenance planning data (MPD) document. That SNPRM was prompted by reports of two in-service occurrences on Model 737- 400 airplanes of total loss of boost pump pressure of the fuel feed system, followed by loss of fuel system suction feed capability on one engine, and in-flight shutdown of the engine. This action revises that SNPRM by adding Model 777F series airplanes to the applicability. We are proposing this AD to detect and correct failure of the engine fuel suction feed of the fuel system, which, in the event of total loss of the fuel boost pumps, could result in dual engine flameout, inability to restart the engines, and consequent forced landing of the airplane. Since this action imposes an additional burden over that proposed in the previous SNPRM, we are reopening the comment period to allow the public the chance to comment on this proposed change.
Amendment of Class E Airspace; Salt Lake City, UT
This action modifies Class E airspace at Salt Lake City, UT, to accommodate aircraft using Area Navigation (RNAV) Global Positioning System (GPS) and Instrument Landing System (ILS) or Localizer (LOC) standard instrument approach procedures at Salt Lake City International Airport. This improves the safety and management of Instrument Flight Rules (IFR) operations at the airport. This action also adjusts the geographic coordinates of the airport, and makes a minor change to the legal description of Class E airspace extending upward from 1,200 feet above the surface, at Salt Lake City, UT.
Amendment of Class E Airspace; Gustavus, AK
This action amends Class E airspace at Gustavus Airport, Gustavus, AK. Decommissioning of the Gustavus Nondirectional Radio Beacon (NDB) 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.
Airworthiness Directives; Bell Helicopter Textron Helicopters
We are superseding Airworthiness Directive (AD) 2008-10-03 for Bell Helicopter Textron Helicopters (Bell) Model 204B, 205A, 205A-1, 205B, 210, 212, 412, 412CF, and 412EP helicopters. AD 2008-10-03 required certain checks and inspections of each tail rotor blade assembly (T/R blade) at specified intervals and repairing or replacing, as applicable, any cracked or damaged T/R blade. Since we issued AD 2008-10-03, an accident attributed to a T/R failure occurred. This new AD retains the requirements of AD 2008-10-03 and adds a second, more detailed inspection that allows for an earlier detection of a crack or other damage in a T/R blade. These actions are intended to prevent a failure of the T/R blade and subsequent loss of helicopter control.
Airworthiness Directives; CFM International, S. A. Turbofan Engines
We are adopting a new airworthiness directive (AD) for certain CFM International, S. A. (CFM) model CFM56-5 and CFM56-5B series turbofan engines. This AD was prompted by corrosion of the delta-P valve in the hydro-mechanical unit (HMU) fuel control caused by exposure to type TS-1 fuel. This AD requires cleaning, inspection, and repair of affected HMUs. We are issuing this AD to prevent seizure of the HMU, leading to failure of one or more engines and damage to the airplane.