# Proposed AD FAA-2007-29259: Boeing Model 767 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-24-08
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 20, 2007, 72 FR 53701
- Comments due: October 22, 2007
- Became: [AD 2007-24-08](https://openairdocs.org/ad/2007-24-08)
- Docket: FAA-2007-29259 (https://www.regulations.gov/docket/FAA-2007-29259, where comments are filed)
- Project: 2007-NM-195-AD
- FR document: E7-18544
- Official PDF: https://openairdocs.org/files/sha256/a7/2c/a72cde6f8f6cda70d4394560ef143c36522835f4b0f55fb52df52378614787c9 (from https://www.govinfo.gov/content/pkg/FR-2007-09-20/pdf/E7-18544.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/09/20/E7-18544/airworthiness-directives-boeing-model-767-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0F7D3C6B5A3699268625735C004D0F0B.0001
- Page: https://openairdocs.org/proposed/FAA-2007-29259

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to all Boeing Model 767 airplanes. The existing AD currently requires repetitive measurements of the rudder and elevator freeplay, repetitive lubrications of rudder and elevator components, and related investigative/corrective actions if necessary. This proposed AD would instead require revised repetitive measurements of the rudder freeplay and the elevator freeplay for each of the power control actuators (PCAs) that move the rudder and elevator, corrective and related investigative actions if necessary, and repetitive lubrications of the rudder and elevator components. For some airplanes, this proposed AD would also require related concurrent actions. This proposed AD results from reports of freeplay-induced vibration of the rudder and the elevator. The potential for vibration of the control surface should be avoided because the point of transition from vibration to divergent flutter is unknown. We are proposing this AD to prevent excessive vibration of the airframe during flight, which could result in loss of control of the airplane.

## Notices in this docket

- Sep 20, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-18544, comments due Oct 22, 2007 (https://www.federalregister.gov/documents/2007/09/20/E7-18544/airworthiness-directives-boeing-model-767-airplanes)

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