Airworthiness Directives; Lycoming Engines Reciprocating Engines
We are revising an earlier proposed airworthiness directive (AD) for certain Lycoming Engines (L)O-360, (L)IO-360, AEIO-360, O-540, IO-540, AEIO-540, (L)TIO-540, IO-580, and IO-720 series reciprocating engines. That NPRM proposed to require replacing certain crankshafts of affected engine models. This action revises that NPRM by including the IO-390, AEIO-390, and AEIO-580 series engine models having affected crankshafts. We are proposing this supplemental NPRM to prevent failure of the crankshaft, which will result in total engine power loss, in- flight engine failure, and possible loss of the aircraft. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.
Proposed Amendment of Class E Airspace; Billings, MT
This action proposes to modify Class E airspace at Billings Logan International Airport, Billings, MT, to accommodate aircraft using Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Billings Logan International Airport. This action also would make a minor adjustment to the geographic coordinates of the airport. The FAA is proposing this action to enhance the safety and management of Instrument Flight Rules (IFR) operations at the airport.
Airworthiness Directives; Bombardier, Inc. Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This proposed AD was prompted by reports of jamming/ malfunctioning of the left-hand engine thrust control mechanism. This proposed AD would require modifying the left-hand engine upper core- cowl. We are proposing this AD to prevent jamming/malfunctioning of the left-hand engine thrust control mechanism, which could lead to loss of control of the airplane.