Airworthiness Directives; Piaggio Aero Industries S.p.A. Model P 180 Airplanes
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Airworthiness Directives; Air Tractor, Inc. AT-400, AT-500, AT-600, and AT-800 Series Airplanes
We are revising an earlier proposed airworthiness directive (AD) that applies to certain Air Tractor, Inc. (Air Tractor) AT-400, AT-500, AT-600, and AT-800 series airplanes. The earlier NPRM proposed to supersede Airworthiness Directive (AD) 2007-13-17, which applies to certain Air Tractor Models AT-602, AT-802, and AT-802A airplanes. AD 2007-13-17 currently requires you to repetitively inspect the engine mount for any cracks, repair or replace any cracked engine mount, and report any cracks found to the FAA. The earlier NPRM proposed to retain the inspection actions of AD 2007-13-17 for Models AT-602, AT-802, and AT-802A airplanes, including the compliance times and effective dates; establish new inspection actions for the AT-400 and AT-500 series airplanes; incorporate a mandatory terminating action for all airplanes; and terminate the reporting requirement of AD 2007-13-17. The earlier NPRM resulted from a Model AT-502B with a crack located where the lower engine mount tube is welded to the engine mount ring, and the manufacturer developing gussets that, when installed according to their service letter, terminate the repetitive inspection requirement. Since issuance of the NPRM, the manufacturer revised the service information and the FAA has determined that it is necessary to address the unsafe condition. Therefore, we are incorporating the service letter revision into the proposed AD, and we are extending the comment period to allow the public additional time to comment.
Establishment of Class E5 Airspace; Prairie Du Sac, WI
This rule establishes a Class E airspace area extending upward from 700 feet above the surface at Prairie Du Sac, WI. The effect of this rule is to provide appropriate controlled Class E airspace for aircraft departing from and executing instrument approach procedures to Sauk-Prairie Airport, Prairie du Sac, WI and to segregate aircraft using instrument approach procedures in instrument conditions from aircraft operating in visual conditions.