# Proposed AD FAA-2004-19221: Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-01-11
- Products: Pilatus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 31, 2004, Federal Register: November 1, 2004 (Volume 69, Number 210)
- Comments due: December 2, 2004
- Became: [AD 2005-01-11](https://openairdocs.org/ad/2005-01-11)
- Docket: FAA-2004-19221 (https://www.regulations.gov/docket/FAA-2004-19221, where comments are filed)
- Project: 2004-CE-28-AD
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/617C44C771A2A73286256F3F004BB011.0001
- Page: https://openairdocs.org/proposed/FAA-2004-19221

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Pilatus Aircraft Ltd. (Pilatus) Models PC-12 and PC-12/45 airplanes. This proposed AD would require you to check the airplane logbook to determine whether any main landing gear (MLG) actuator (part number (P/N) 960.30.01.103) with serial numbers (SNs) 830E through 881E is installed. If any MLG actuator with one of these SNs is installed, you are required to replace the MLG actuator with a P/N 960.30.01.103 actuator that has a SN other than 830E through 881E. The pilot is allowed to do the logbook check. If the pilot can positively determine that no MLG actuator with one of these SNs is installed, no further action is required. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. We are issuing this proposed AD to prevent failure of the MLG actuator, which could result in loss of hydraulic extension/retraction of the MLG. This failure could lead to loss of control during ground operations.

## Notices in this docket

- Oct 31, 2004: Notice of proposed rulemaking (NPRM). (first notice), comments due Dec 2, 2004 (https://drs.faa.gov/browse/excelExternalWindow/617C44C771A2A73286256F3F004BB011.0001)

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