Airworthiness directives › 2019-21-12
AD 2019-21-12 Airworthiness Directives; BRP-Rotax GmbH & Co KG Engines
Makes named: rotax, brp-rotax. Models named: 914 F2, 914 F3, 914 F4. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to BRP-Rotax GmbH & Co KG (Type certificate previously held by BRP-Powertrain GmbH & Co KG, Bombardier-Rotax GmbH) (Rotax) Model 914 F2, 914 F3, and 914 F4 engines, with an exhaust valve part number (P/N) 854113 that has a production lot number 0317 or 0517.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 10 flight hours or 3 months after the effective date of this AD, whichever occurs first, remove from service each exhaust valve P/N 854113 that has a production lot number 0317 or 0517, and replace with a part eligible for installation. Note 1 to paragraph (g): For guidance on replacing the exhaust valve, refer to the Accomplishment Instructions, paragraphs 3.1 through 3.6, of Rotax Alert Service Bulletin ASB-915 i A-003R2/ASB-915 i B-003R2/ASB-914-054R2 (single document), dated December 21, 2018.
Unsafe condition
This AD was prompted by a report of a broken exhaust valve installed on a Rotax 914 model engine. The FAA is issuing this AD to prevent failure of the exhaust valve. The unsafe condition, if not addressed, could result in loss of engine thrust control and reduced control of the airplane.
Affected ADs
None.
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