Federal Aviation Administration October 26, 2006 – Federal Register Recent Federal Regulation Documents

The FAA proposes to supersede an existing airworthiness directive (AD) for Teledyne Continental Motors (TCM) GTSIO-520 series reciprocating engines. That AD currently requires initial and repetitive visual inspections of the starter adapter assembly and crankshaft gear and unscheduled visual inspections of the starter adapter assembly and crankshaft gear due to a rough-running engine. That AD also requires replacement of the starter adapter shaft gear needle bearing with a certain bushing and installation of a certain TCM service kit at the next engine overhaul, or at the next starter adapter replacement, whichever occurs first. This proposed AD would require the inspection ordered in paragraph (h) of AD 2005-20-04 to be done every 100 hours time-in-service (TIS), or annually. This proposed AD results from an error discovered in AD 2005-20-04. We are proposing this AD to prevent failure of the starter adapter assembly and or crankshaft gear, resulting in failure of the engine and possible forced landing.

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 747-400, 747-400D, and 747-400F series airplanes. This proposed AD would require replacement of an electronic flight information system/engine indicating and crew alerting system (EFIS/EICAS) interface unit (EIU) located on the E2-6 shelf of the main equipment center with a new or modified EIU. This proposed AD results from two instances where all six integrated display units (IDUs) on the flight deck panels went blank in flight. We are proposing this AD to prevent loss of the IDUs due to failure of all three EIUs, which could result in the inability of the flightcrew to maintain safe flight and landing of the airplane.

This notice announces the issuance of Advisory Circular (AC) 33.83A, Turbine Engine Vibration Test. This advisory circular (AC) provides guidance and acceptable methods, but not the only methods, that may be used to demonstrate compliance with the vibration test requirements of Sec. 33.83 of Title 14 of the Code of Federal Regulations (14 CFR part 33). This AC cancels AC 33.83, dated February 14, 1997.

This action revises Class E airspace at Mountain Home, ID, beginning at 1,200 feet above ground level (AGL), replacing the existing Class G uncontrolled airspace. This airspace action accommodates the terminal environment transition between Salt Lake Air Route Traffic Control Center (ARTCC) and Mountain Home AFB Radar Approach Control (RAPCON) by placing aircraft in controlled airspace during the transfer of aircraft radar identification between the facilities. In addition, a review of the legal description revealed that it does not reflect the correct airport reference point (ARP) of Mountain Home Municipal Airport and geographic position of the Sturgeon Non-Directional Beacon (NDB). The notice of Proposed Rulemaking published in the Federal Register on August 21, 2006, included an incorrect longitude for Mountain Home TACAN. This action corrects those minor discrepancies.

This action establishes a Class E airspace area at Bethel Regional Airport, Bethel, ME (K0B1) to provide for adequate controlled airspace for those aircraft using the new Helicopter Area Navigation (RNAV), 317 Instrument Approach Procedure to the Airport.