Airworthiness Directive · Amendment 39-19178 · Reciprocating engine
Various Aircraft Equipped With BRP-Rotax GmbH & Co KG 912 A Series Engine
This AD applies to all serial numbers of the airplanes listed in table 1 to paragraph (c) of this AD, certificated in any category that are either:
(1) Equipped with a BRP-Rotax GmbH & Co. KG (formerly BRP-Powertrain GmbH & Co. KG; Bombardier-Rotax GmbH & Co. KG; Bombardier-Rotax GmbH) 912 A series engine (Rotax 912 A series engine) with a serial number (S/N) listed in table 2 to paragraph (c) of this AD; or
(2) equipped with a Rotax 912 A series engine with any S/N that has had a part number (P/N) 854861 valve push-rod assembly replaced in-service (e.g., during engine repair, maintenance, or general overhaul) during the time frame of June 8, 2016, to the effective date of this AD.
We are adopting a new airworthiness directive (AD) for various aircraft equipped with a BRP-Rotax GmbH & Co. KG (formerly BRP- Powertrain GmbH & Co. KG; Bombardier-Rotax GmbH & Co. KG; Bombardier- Rotax GmbH) 912 A series engine. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and address an unsafe condition on an aviation product. The MCAI describes the unsafe condition as defective valve push-rod assemblies manufactured from June 8, 2016, through October 2, 2017. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions:
(1) For aircraft with engines that have 160 hours time-in-service (TIS) or less since first installed: Before exceeding 170 hours TIS on the engine since first installed or within the next 3 months after March 20, 2018 (the effective date of this AD), whichever occurs first, visually inspect the valve push-rod ball sockets of each valve push-rod using the Accomplishment Instructions in Rotax Aircraft Engines BRP Service Bulletin SB-912 i-008 R1/SB-912-070 R1/SB-914-052 R1 (co-published as one document), Revision 1, dated October 12, 2017 (Rotax SB SB-912 i-008 R1/SB-912-070 R1/SB-914-052 R1).
(2) For airplanes with engines that have 160 hours TIS or more since first installed: Within the next 10 hours TIS after March 20, 2018 (the effective date of this AD) or within the next 3 months after March 20, 2018 (the effective date of this AD), whichever occurs first, visually inspect the valve push-rod ball sockets of each valve push-rod using the Accomplishment Instructions in Rotax SB SB-912 i-008 R1/SB-912-070 R1/SB-914-052 R1.
(3) For all affected airplanes: If a valve push-rod with a black surface is found during the inspection required in paragraph (f)(1) or (f)(2) of this AD, before further flight, replace the valve push-rod and its affected parts with airworthy parts using the Accomplishment Instructions in Rotax SB SB-912 i-008 R1/SB-912-070 R1/SB-914-052 R1.
(4) For all affected airplanes: As of March 20, 2018 (the effective date of this AD), do not install a valve push-rod that was manufactured from June 8, 2016, through October 2, 2017.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Engines
Appliances and equipment
