Airworthiness Directive · Amendment 39-19121 · Engine exhaust
Alexander Schleicher GmbH & Co. Segelflugzeugbau Gliders
This AD applies to Alexander Schleicher GmbH & Co. Segelflugzeugbau Models ASH 25M and ASH 26E gliders, all serial numbers, that:
(1) Have an exhaust silencer, part number (P/N) 800.65.0001, installed; and
(2) are certificated in any category.
We are adopting a new airworthiness directive (AD) for all Alexander Schleicher GmbH & Co. Segelflugzeugbau Models ASH 25M and ASH 26E gliders. This AD results from mandatory continuing airworthiness information (MCAI) issued 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 fatigue cracks found on the exhaust silencer. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions:
(1) Before exceeding 150 hours time-in-service (TIS) on the exhaust silencer, P/N 800.65.0001, since new, or within the next 5 hours TIS after January 18, 2018 (the effective date of this AD), whichever occurs later, replace P/N 800.65.0001 with an improved exhaust silencer, P/N 800.65.9010. Do the replacement as specified in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASK 21 Mi Technical Note No. 11, ASW 22 BLE 50 R Technical Note No. 16, ASH 25 M/Mi Technical Note No. 32, ASH 26 E Technical Note No. 19 (single document), dated January 8, 2016.
(2) As of January 18, 2018 (the effective date of this AD), do not install a P/N 800.65.0001 exhaust silencer.
