Department of Transportation October 29, 2013 – Federal Register Recent Federal Regulation Documents

The Federal Aviation Administration is requesting public comment on request by the Louisville Regional Airport Authority to temporarily change a portion of airport property from aeronautical to non-aeronautical use at the Bowman Field Airport, Louisville, Kentucky. The request consists approximately of 0.41 acres of temporary use. This action is taken under the provisions of Section 125 of the Wendell H. Ford Aviation Investment Reform Act for the 21st Century (AIR 21).

We propose to adopt a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) PT6A-114 and PT6A-114A turboprop engines. This proposed AD was prompted by several incidents of compressor turbine (CT) blade failure, including two fatalities, resulting in power loss and in-flight shutdown (IFSD) of the engine. This proposed AD would require initial and repetitive borescope inspections (BSIs) of CT blades, and the removal from service of blades that fail inspection. We are proposing this AD to prevent failure of CT blades, which could lead to damage to the engine or to the airplane.

As authorized by 46 U.S.C. 12121, the Secretary of Transportation, as represented by the Maritime Administration (MARAD), is authorized to grant waivers of the U.S.-build requirement of the coastwise laws under certain circumstances. A request for such a waiver has been received by MARAD. The vessel, and a brief description of the proposed service, is listed below.

We are superseding airworthiness directive (AD) 2012-24-09 for Lycoming Engines TIO-540-AK1A, and Continental Motors, Inc. (CMI) TSIO- 360-MB, TSIO-360-SB, and TSIO-360-RB reciprocating engines, with certain Hartzell Engine Technologies (HET) turbochargers, model TA0411, installed. AD 2012-24-09 required removing certain HET turbochargers from service before further flight. This AD also requires removing certain HET turbochargers from service before further flight. This AD was prompted by a report that an additional engine, the CMI LTSIO-360- RB, has the affected HET turbochargers installed. We are issuing this AD to prevent turbocharger turbine wheel failure, reduction or complete loss of engine power, loss of engine oil, oil fire, and damage to the airplane.

This notice announces final environmental actions taken by the FHWA, the National Park Service (NPS), the United States Fish and Wildlife Service (USF&WS), and other Federal agencies that are final within the meaning of 23 U.S.C. Sec. 139(l)(1). The actions relate to the Stehekin Valley Road Improvement project from the Stehekin River Corridor Implementation Plan in Chelan County, Washington. This action grants approval for the road improvement project element of the plan.