# Proposed AD FAA-2008-1085: Piper Aircraft, Inc. Models PA-46-350P, PA-46R-350T, and PA-46-500TP Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-26-11
- Products: Piper
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 10, 2008, 73 FR 60201
- Comments due: December 9, 2008
- Became: [AD 2008-26-11](https://openairdocs.org/ad/2008-26-11)
- Docket: FAA-2008-1085 (https://www.regulations.gov/docket/FAA-2008-1085, where comments are filed)
- Project: 2008-CE-057-AD
- FR document: E8-24136
- Official PDF: https://openairdocs.org/files/sha256/52/a9/52a979158951318ea61c99e9434c7d94756fe19d023515382c8ec96e086205de (from https://www.govinfo.gov/content/pkg/FR-2008-10-10/pdf/E8-24136.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/10/10/E8-24136/airworthiness-directives-piper-aircraft-inc-models-pa-46-350p-pa-46r-350t-and-pa-46-500tp-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/432FF18A8CE05FEC862574DE004F319F.0001
- Page: https://openairdocs.org/proposed/FAA-2008-1085

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Piper Aircraft, Inc. (Piper) Models PA-46-350P, PA-46R-350T, and PA-46-500TP airplanes. This proposed AD would require you to install a stall warning heat control modification kit. This proposed AD results from ice forming on the stall vane heater during flights into icing conditions with the landing gear down. We are proposing this AD to prevent ice from forming on the stall vane, which may result in failure of the stall warning system. This failure could result in the pilot being unaware of an approaching stall situation.

## Notices in this docket

- Oct 10, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-24136, comments due Dec 9, 2008 (https://www.federalregister.gov/documents/2008/10/10/E8-24136/airworthiness-directives-piper-aircraft-inc-models-pa-46-350p-pa-46r-350t-and-pa-46-500tp-airplanes)

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