# Proposed AD FAA-2005-20720: Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-11-06
- Products: Pilatus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 13, 2005, 70 FR 19342
- Comments due: May 13, 2005
- Became: [AD 2005-11-06](https://openairdocs.org/ad/2005-11-06)
- Docket: FAA-2005-20720 (https://www.regulations.gov/docket/FAA-2005-20720, where comments are filed)
- Project: 2005-CE-17-AD
- FR document: 05-7382
- Official PDF: https://openairdocs.org/files/sha256/02/6c/026c28429270180f652e4e35a11d40c7c749eeef5ba36928c45b28b4fb248147 (from https://www.govinfo.gov/content/pkg/FR-2005-04-13/pdf/05-7382.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/04/13/05-7382/airworthiness-directives-pilatus-aircraft-ltd-models-pc-12-and-pc-1245-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FA26F5AE32B7B80E86256FE200639A93.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20720

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Models PC-12 and PC-12/45 airplanes. This proposed AD would require you to insert a temporary revision into the Limitations Section of the Pilot Operating Handbook (POH). This proposed AD would also require you to replace the pitch actuator with an improved design pitch actuator and make the necessary wiring and circuit breaker changes, as applicable. Installing the improved design pitch actuator terminates the need for the temporary revision in the POH. 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 an out-of- trim condition from occurring when the flaps are at a 40-degree flight phase and the pilot disconnects the autopilot. This condition could lead to reduced ability to control the airplane.

## Notices in this docket

- Apr 13, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-7382, comments due May 13, 2005 (https://www.federalregister.gov/documents/2005/04/13/05-7382/airworthiness-directives-pilatus-aircraft-ltd-models-pc-12-and-pc-1245-airplanes)

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