# Proposed AD 99-CE-77-AD: Pilatus Aircraft LTD Model PC-6 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-02-04
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 2, 2000, 65 FR 65798
- Comments due: December 8, 2000
- Became: [AD 2001-02-04](https://openairdocs.org/ad/2001-02-04)
- Docket: 99-CE-77-AD
- FR document: 00-28096
- Official PDF: https://openairdocs.org/files/sha256/9e/a3/9ea34f4d7bb80cc66f5a486be5a334bdaa433f8bfa7d0edf0a5b8c0d546d901b (from https://www.govinfo.gov/content/pkg/FR-2000-11-02/pdf/00-28096.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/11/02/00-28096/airworthiness-directives-pilatus-aircraft-ltd-model-pc-6-airplanes
- Page: https://openairdocs.org/proposed/99-CE-77-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to all Pilatus Aircraft LTD (Pilatus) Model PC-6 airplanes that are equipped with a certain stabilizer trim actuator. The proposed AD would require you to inspect the lower lug of the actuator for cracks, damage, or distortion; verify that the staked bearing is correctly installed in the bore of the lug; and repair any cracked, damaged, or distorted parts and reassemble any incorrectly installed staked bearing, as necessary. The proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified by the proposed AD are intended to detect and correct damage, distortion, or cracks in the lower lug assembly, which could result in failure of the lower lug. Such failure could lead to loss of the stabilizer trim actuator with consequent loss of control of the airplane.

## Notices in this docket

- Nov 2, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-28096, comments due Dec 8, 2000 (https://www.federalregister.gov/documents/2000/11/02/00-28096/airworthiness-directives-pilatus-aircraft-ltd-model-pc-6-airplanes)

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