# Proposed AD FAA-2010-0342: Bombardier-Rotax GmbH Type 912 F, 912 S, and 914 F Series Reciprocating Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-20-23
- Products: Bombardier-Rotax
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 7, 2010, 75 FR 17632
- Comments due: June 7, 2010
- Became: [AD 2010-20-23](https://openairdocs.org/ad/2010-20-23)
- Docket: FAA-2010-0342 (https://www.regulations.gov/docket/FAA-2010-0342, where comments are filed)
- Project: 2002-NE-08-AD
- FR document: 2010-7831
- Official PDF: https://openairdocs.org/files/sha256/24/ae/24aec9edd0131c728f214e9e60f950c8d184b1f90d9066fd3d233f0dc2a36541 (from https://www.govinfo.gov/content/pkg/FR-2010-04-07/pdf/2010-7831.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/04/07/2010-7831/airworthiness-directives-bombardier-rotax-gmbh-type-912-f-912-s-and-914-f-series-reciprocating
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/87C3D48DFB4162B8862576FE004D0D35.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0342

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) for certain serial numbers (S/Ns) of Bombardier-Rotax GmbH type 912 F and 914 F series reciprocating engines. That AD currently requires initial and repetitive visual inspections of the engine crankcase for cracks. This proposed AD would require those same inspections, would add the 912 S series to the affected population, add a test procedure to determine the engine suitability for a special flight permit, and would change applicability from engine S/N to crankcase S/N. This proposed AD results from an increase in the affected crankcase population. We are proposing this AD to prevent oil loss caused by cracks in the engine crankcase, which could lead to in- flight failure of the engine and forced landing.

## Notices in this docket

- Apr 7, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-7831, comments due Jun 7, 2010 (https://www.federalregister.gov/documents/2010/04/07/2010-7831/airworthiness-directives-bombardier-rotax-gmbh-type-912-f-912-s-and-914-f-series-reciprocating)

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