# Proposed AD FAA-2009-0654: Saab AB, Saab Aerosystems Model SAAB 2000 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-22-07
- Products: SAAB
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 21, 2009, 74 FR 35828
- Comments due: August 20, 2009
- Became: [AD 2009-22-07](https://openairdocs.org/ad/2009-22-07)
- Docket: FAA-2009-0654 (https://www.regulations.gov/docket/FAA-2009-0654, where comments are filed)
- Project: 2008-NM-083-AD
- FR document: E9-17227
- Official PDF: https://openairdocs.org/files/sha256/ab/a7/aba7092b5c309dd6d082ad5a35a63fb85a107463268eec1679037b291a2761f4 (from https://www.govinfo.gov/content/pkg/FR-2009-07-21/pdf/E9-17227.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/07/21/E9-17227/airworthiness-directives-saab-ab-saab-aerosystems-model-saab-2000-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2B39C232846FDA61862575FA00610A4E.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0654

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated 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:

There have been reported incidents of brinelling to the self- sealing coupling Part Number (P/N) 9304000-303 (Nipple Assembly). The wear is visible in the groove of the nipple, caused by the socket locking balls. During tear down investigations of self- sealing coupling P/N 9304000-305 (Socket Assembly), internal socket wear has been observed. Wear that exceeds the allowable limits could lead to reduced oil flow, and further wear could contribute to separation of the Self-Seal Coupling, making the engine inoperable and subsequent shut down. As secondary damage, the generator may fail, releasing oil into the nacelle and increasing the possibility of fire.

* * * * * The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Jul 21, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-17227, comments due Aug 20, 2009 (https://www.federalregister.gov/documents/2009/07/21/E9-17227/airworthiness-directives-saab-ab-saab-aerosystems-model-saab-2000-airplanes)

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