Federal Aviation Administration January 20, 2011 – Federal Register Recent Federal Regulation Documents
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Airworthiness Directives; The Boeing Company Model 777-200 and -300 Series Airplanes Equipped with Rolls-Royce RB211 Trent 800 Engines
We propose to adopt a new airworthiness directive (AD) for certain Model 777-200 and -300 series airplanes. This proposed AD would require repetitive inspections of all thrust reverser (T/R) structure and sealant for degradation, and related investigative and corrective actions if necessary. This proposed AD results from reports of thrust reverser events related to thermal damage of the thrust reverser inner wall. We are proposing this AD to detect and correct a degraded T/R inner wall panel, which could lead to failure of a T/R and adjacent components and their consequent separation from the airplane, which could result in a rejected takeoff (RTO) and cause asymmetric thrust and consequent loss of control of the airplane during reverse thrust operation. If a T/R inner wall overheats, separated components could cause structural damage to the airplane, damage to other airplanes, or possible injury to people on the ground.
Airworthiness Directives; The Boeing Company Model 777-200 and -300 Series Airplanes Equipped With Pratt and Whitney Engines
We propose to adopt a new airworthiness directive (AD) for certain Model 777-200 and -300 series airplanes. This proposed AD would require repetitive inspections for hydraulic fluid contamination of the interior of the strut disconnect assembly; repetitive inspections for discrepancies of the interior of the strut disconnect assembly, if necessary; repetitive inspections of the exterior of the strut disconnect assembly for cracks, if necessary; and corrective action if necessary. This proposed AD also provides an optional terminating action for the inspections. This proposed AD results from reports of system disconnect boxes that have been contaminated with hydraulic fluid and, in one incident, led to subsequent cracking of titanium parts in the system disconnect assembly. We are proposing this AD to detect and correct hydraulic fluid contamination, which can cause cracking of titanium parts in the system disconnect assembly, resulting in compromise of the engine firewall. A cracked firewall can allow fire in the engine area to enter the strut and can lead to an uncontained engine strut fire if flammable fluid is present. Cracking of the disconnect box may also reduce the effectiveness of the fire extinguishing system in the engine compartment and could contribute to an uncontained engine fire. In addition, a cracked disconnect box can leak flammable fluids into the engine core, which can initiate an engine fire, and lead to one or both fire conditions discussed above.
Airworthiness Directives; Saab AB, Saab Aerosystems Model SAAB 340A (SAAB/SF340A) and SAAB 340B Airplanes Modified in Accordance With Supplemental Type Certificate (STC) ST00224WI-D, ST00146WI-D, or SA984GL-D
We are revising an earlier proposed airworthiness directive (AD) for certain Saab AB, Saab Aerosystems Model SAAB 340A (SAAB/ SF340A) and SAAB 340B airplanes. The first supplemental NPRM would have required inspecting the fuselage surface for corrosion and cracking behind the external adapter plate of the antennae installation, and repair if necessary. The first supplemental NPRM resulted from a report of a crack found behind the external adapter plate of the antennae during inspection. Similar cracking was found on two additional airplanes, and extensive corrosion was found on one airplane. This action revises the first supplemental NPRM by correcting an STC number, which would expand the applicability of the first supplemental NPRM. We are proposing this second supplemental NPRM to detect and correct corrosion and cracking behind the external adapter plate of the antennae of certain damage- tolerant structure, which could result in reduced structural integrity and consequent rapid depressurization of the airplane.
Proposed Establishment of Class E Airspace; Kahului, HI
This action proposes to establish Class E airspace at Kahului Airport, Kahului, HI. Controlled airspace is necessary to accommodate aircraft using the Instrument Landing System (ILS) standard instrument approach procedures at Kahului Airport, Kahului, HI. The FAA is proposing this action to enhance the safety and management of aircraft operations at the airport.
Proposed Amendment of Class E Airspace; Taylor, AZ
This action proposes to modify Class E airspace at Taylor Airport, Taylor, AZ. Controlled airspace is necessary to accommodate aircraft using the CAMBO One Departure Area Navigation (RNAV) out of Taylor Airport. The FAA is proposing this action to enhance the safety and management of aircraft operations at Taylor Airport, Taylor, AZ.
Proposed Amendment of Class E Airspace; West Yellowstone, MT
This action proposes to modify Class E airspace at Yellowstone Airport, West Yellowstone, MT, to accommodate aircraft using the Instrument Landing System (ILS) Localizer (LOC) standard instrument approach procedures at Yellowstone Airport, West Yellowstone, MT. The FAA is proposing this action to enhance the safety and management of aircraft operations at Yellowstone Airport.
Public Notice for Waiver of Aeronautical Land-Use Assurance Viroqua Municipal Airport; Viroqua, WI
The Federal Aviation Administration (FAA) is considering a proposal to authorize the release of 0.93 acres of the airport property at the Viroqua Municipal Airport, Viroqua, WI. The Wisconsin Department of Transportation (WisDOT) is seeking airport property for right of way along U.S. Highway 14/61. The FAA issued a categorical exclusion on December 23, 2010. The acreage being released is not needed for aeronautical use as currently identified on the Airport Layout Plan. The acreage comprising this parcel was originally acquired with local funds by the City of Viroqua. The airport will receive the appraised fair market value of $495,909 for the land. Approval does not constitute a commitment by the FAA to financially assist in the disposal of the subject airport property nor a determination of eligibility for grant-in-aid funding from the FAA. The disposition of proceeds from the disposal of the airport property will be in accordance with FAA's Policy and Procedures Concerning the Use of Airport Revenue, published in the Federal Register on February 16, 1999. In accordance with section 47107(h) of title 49, United States Code, this notice is required to be published in the Federal Register 30 days before modifying the land-use assurance that requires the property to be used for an aeronautical purpose.
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