Federal Aviation Administration November 4, 2015 – Federal Register Recent Federal Regulation Documents
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Special Conditions: Kestrel Aircraft Company, Model K-350 Turboprop, Lithium Batteries
This action proposes special conditions for the Kestrel Aircraft Company, Model K-350 Turboprop airplane. This airplane will have a novel or unusual design feature associated with the installation of a rechargeable lithium battery. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These proposed special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.
Airworthiness Directives; Rolls-Royce plc Turbofan Engines
We propose to adopt a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4- C-37 turbofan engines. This proposed AD was prompted by a review of operational data that determined certain RR RB211-535E4-37 engines have been operated to a more severe flight profile than is consistent with the flight profile used to establish the cyclic life limits for the rotating parts. This proposed AD would require recalculating the cyclic life for certain engine life-limited rotating parts and removing those parts that have exceeded their cyclic life limit within specified compliance times. We are proposing this AD to prevent failure of life- limited rotating parts, which could result in uncontained parts release, damage to the engine, and damage to the airplane.
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