# Proposed AD 2002-NM-332-AD: Cessna Model 650 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-13-21
- Products: Cessna
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: April 22, 2005, 70 FR 20844
- Comments due: May 17, 2005
- Became: [AD 2005-13-21](https://openairdocs.org/ad/2005-13-21)
- Docket: 2002-NM-332-AD
- FR document: 05-8095
- Official PDF: https://openairdocs.org/files/sha256/30/20/30208c810edd708abdb4c2e14baa8bb537558e2852fca94ca566a0bdbc98d90c (from https://www.govinfo.gov/content/pkg/FR-2005-04-22/pdf/05-8095.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/04/22/05-8095/airworthiness-directives-cessna-model-650-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5D18EB4FECCA24B886256FEB0057FE99.0001
- Page: https://openairdocs.org/proposed/2002-NM-332-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain Cessna Model 650 airplanes, that would have required repetitive replacement of the horizontal stabilizer primary trim actuator assembly (HSTA) with a repaired assembly. This new action revises the proposed rule by removing the requirement for repetitive replacement of the HSTA; adding a requirement to inspect to determine the part number of the actuator control unit (ACU) and replace the ACU with a new, improved ACU if necessary; and adding a requirement to revise the Limitations section of the airplane flight manual. This new action also revises the applicability to include all Model 650 airplanes. The actions specified by this new proposed AD are intended to prevent uncommanded movement of the horizontal stabilizer, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Aug 6, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-19984, comments due Sep 22, 2003 (https://www.federalregister.gov/documents/2003/08/06/03-19984/airworthiness-directives-cessna-model-650-airplanes)
- Apr 22, 2005: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 05-8095, comments due May 17, 2005 (https://www.federalregister.gov/documents/2005/04/22/05-8095/airworthiness-directives-cessna-model-650-airplanes)

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