# Proposed AD FAA-2006-25929: Pilatus Aircraft Ltd., PC-6 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Pilatus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 3, 2006, 71 FR 64653
- Comments due: December 4, 2006
- Docket: FAA-2006-25929 (https://www.regulations.gov/docket/FAA-2006-25929, where comments are filed)
- Project: 2006-CE-54-AD
- FR document: E6-18574
- Official PDF: https://openairdocs.org/files/sha256/b2/9e/b29e34416c3eae90dcc83ece352d6b55a6436212df0bd472da118934ff5bbe84 (from https://www.govinfo.gov/content/pkg/FR-2006-11-03/pdf/E6-18574.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/11/03/E6-18574/airworthiness-directives-pilatus-aircraft-ltd-pc-6-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/221600EE41F67B898625721B0050C54C.0001
- Page: https://openairdocs.org/proposed/FAA-2006-25929

## 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) issued 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 the discovery of exfoliation corrosion in the fittings of some PC-6 airplanes. These fittings are installed exterior to the bottom skin of the wing skin. If not corrected, undetected corrosion in this area could lead to failure of the fitting and subsequent loss of control of the airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Nov 3, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-18574, comments due Dec 4, 2006 (https://www.federalregister.gov/documents/2006/11/03/E6-18574/airworthiness-directives-pilatus-aircraft-ltd-pc-6-series-airplanes)

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