Federal Aviation Administration April 12, 2011 – Federal Register Recent Federal Regulation Documents

This action proposes to modify Class E airspace at Newcastle, WY, to accommodate aircraft using the Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Mondell Field Airport. The FAA is proposing this action to enhance the safety and management of aircraft operations at the airport. The airport name also would change to Mondell Field Airport.

This action proposes to amend Class E airspace at Madison, SD to accommodate new Standard Instrument Approach Procedures (SIAP) at Madison Municipal Airport. The FAA is taking this action to enhance the safety and management of Instrument Flight Rules (IFR) operations for SIAPs at the airport.

The FAA is issuing this notice to advise the public of a meeting of RTCA Special Committee 223: Airport Surface Wireless Communications.

The Federal Aviation Administration is announcing the approval of the Supplemental Finding of No Significant Impact/Record of Decision (FONSI/ROD) for the Supplemental Environmental Assessment (EA) for changes proposed to the construction of a new land-based airport in Akutan, AK. The Supplemental FONSI/ROD provides final agency determinations and approvals for the proposed development.

We are superseding an existing airworthiness directive (AD) for RR RB211-Trent 700 series turbofan engines. That AD currently requires, for the step aside gearbox (SAGB), repositioning of the oil metering jet up into the oil distributor within the bevel gearshaft, followed by initial and repetitive visual inspections of the magnetic chip detector (MCD). Since we issued that AD, RR has demonstrated that the repositioning of the oil metering jet eliminates the need for the repetitive inspections. This AD changes the applicability from RB211- Trent 700 series turbofan engines, to RB211-Trent 768-60 and Trent 772- 60 turbofan engines. This AD also eliminates the visual inspections of the MCD from the AD requirements. This AD was prompted by RR demonstrating that the repositioning of the oil metering jet eliminates the need for the repetitive inspections, by the need to correct the AD applicability, and by the need to eliminate the visual inspections of the MCD. We are issuing this AD to prevent in-flight engine shutdowns caused by SAGB driving bevel gearshaft ball bearing failure.