Federal Aviation Administration September 8, 2017 – Federal Register Recent Federal Regulation Documents
Results 1 - 5 of 5
Airworthiness Directives; Airbus Helicopters
We propose to supersede airworthiness directive (AD) 2015-22- 53 for Airbus Helicopters (Airbus) Model AS350B3 helicopters. AD 2015- 22-53 requires revising the rotorcraft flight manual (RFM) to perform the yaw load compensator check after rotor shut-down and to state that the yaw servo hydraulic switch must be in the ``ON'' position before taking off. Since we issued AD 2015-22-53, Airbus developed a modification of the ACCU TST switch. This proposed AD would retain the requirements of AD 2015-22-53 and require modifying the yaw servo hydraulic switch (collective switch) and replacing the ACCU TST button. The actions of this proposed AD are intended to address an unsafe condition on these products.
Airworthiness Directives; Agusta S.p.A. Helicopters
We are superseding Airworthiness Directive (AD) 2015-22-51 for Agusta S.p.A. (Agusta) Model A109A and A109A II helicopters. AD 2015- 22-51 required pre-flight checking and inspecting each main rotor blade (blade) for a crack and replacing any cracked blade. This new AD removes the check and requires inspecting each blade more frequently. This AD is prompted by a crack that was not detected during any of the pre-flight checks. The actions of this AD are intended to address the unsafe condition on these products.
Amendment of Class E Airspace; Falls City, NE
This action modifies Class E airspace extending upward from 700 feet above the surface at Brenner Field Airport, Falls City, NE. Airspace reconfiguration is necessary due to the decommissioning of the Brenner non-directional radio beacon (NDB), and cancellation of the NDB approach. This action enhances the safety and management of standard instrument approach procedures for instrument flight rules (IFR) operations at the airport.
Airworthiness Directives; Rolls-Royce Corporation Turboshaft Engines
We are superseding Airworthiness Directive (AD) 2015-02-22 for certain Rolls-Royce Corporation (RRC) model 250 turboprop and turboshaft engines. AD 2015-02-22 required repetitive visual inspections and fluorescent-penetrant inspection (FPIs) on certain 3rd- stage and 4th-stage turbine wheels for cracks in the turbine wheel blades. This AD requires repetitive visual inspections and FPIs of 3rd- stage turbine wheels while removing from service 4th-stage turbine wheels. We are also revising the applicability to remove all RRC turboprop engines and add additional turboshaft engines. This AD was prompted by our finding that it is necessary to remove the 4th-stage wheels at the next inspection. We are issuing this AD to address the unsafe condition on these products.
Airworthiness Directives; Viking Air Limited Airplanes
We propose to adopt a new airworthiness directive (AD) for all Viking Air Limited Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-2 Mk. III airplanes. 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 cracking found in the wing rear spar web at the wing station where the flap outboard hinge is attached. We are issuing this proposed AD to require actions to address the unsafe condition on these products.
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