# Airworthiness Directives; Piper Aircraft, Inc. Airplanes
> **Rule** · Final rule; request for comments. · Published 2021-04-16 · Effective 2021-04-16 · 86 FR 20029
## Document
- **Document number:** 2021-07897
- **Category:** airworthiness
- **Manufacturer:** Piper
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 86 FR 20029
- **Publication date:** 2021-04-16
- **Effective date:** 2021-04-16
- **FAA docket:** Docket No. FAA-2021-0310
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2021-04-07 which applied to certain Piper Aircraft, Inc., (Piper) Models PA-46- 350P (Malibu Mirage), PA-46R-350T (Malibu Matrix), and PA-46-500TP (Malibu Meridian) airplanes. AD 2021-04-07 required identifying and correcting nonconforming stall warning heat control systems. Since AD 2021-04-07 was issued, the FAA was notified of an error in the stall warning heat control modification kit part number. This AD retains all of the actions in AD 2021-04-07 and corrects the incorrect modification kit part number. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/04/16/2021-07897/airworthiness-directives-piper-aircraft-inc-airplanes)
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