# Airworthiness Directives; Bombardier-Rotax GmbH Type 912 F, 912 S, and 914 F Series Reciprocating Engines
> **Rule** · Final rule. · Published 2010-10-04 · Effective 2010-11-08 · 75 FR 61046
## Document
- **Document number:** 2010-24629
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 75 FR 61046
- **Publication date:** 2010-10-04
- **Effective date:** 2010-11-08
- **FAA docket:** Docket No. FAA-2010-0342
## Abstract

The FAA is superseding 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 AD requires those same inspections, adds the 912 S series to the affected population, adds a test procedure to determine the engine suitability for a special flight permit, and changes applicability from engine S/N to crankcase S/N. This AD results from an increase in the affected crankcase population. We are issuing 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/10/04/2010-24629/airworthiness-directives-bombardier-rotax-gmbh-type-912-f-912-s-and-914-f-series-reciprocating)
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