# Proposed AD FAA-2008-0626: Pilatus Aircraft Ltd. Model PC-6 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Pilatus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 9, 2008, 73 FR 32497
- Comments due: July 9, 2008
- Docket: FAA-2008-0626 (https://www.regulations.gov/docket/FAA-2008-0626, where comments are filed)
- Project: 2008-CE-035-AD
- FR document: E8-12816
- Official PDF: https://openairdocs.org/files/sha256/40/3a/403a56d07c48886410d623e100820278e165dfe3a8cc632d2c06810c8d152f68 (from https://www.govinfo.gov/content/pkg/FR-2008-06-09/pdf/E8-12816.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/06/09/E8-12816/airworthiness-directives-pilatus-aircraft-ltd-model-pc-6-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B4711AC97172FB4B86257463005C24C0.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0626

## 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:

This Airworthiness Directive (AD) is prompted due to the discovery of loose self-locking stop nuts Part Number (P/N) 938.07.65.105 in the tail landing gear fastener assemblies of some PC-6 aircraft. It is believed that this occurrence could also exist in other fastener assemblies using nuts P/N 938.07.65.105 at various identified locations in the aircraft. If left uncorrected, the identified assemblies may become loose and not function as designed and could lead to hazardous situations.

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

## Notices in this docket

- Jun 9, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-12816, comments due Jul 9, 2008 (https://www.federalregister.gov/documents/2008/06/09/E8-12816/airworthiness-directives-pilatus-aircraft-ltd-model-pc-6-airplanes)

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