# Proposed AD 96-NM-25-AD: Boeing Model 767 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 96-21-06
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 14, 1996, 61 FR 24250
- Comments due: June 24, 1996
- Became: [AD 96-21-06](https://openairdocs.org/ad/96-21-06)
- Docket: 96-NM-25-AD
- FR document: 96-12021
- Official PDF: https://openairdocs.org/files/sha256/b3/73/b373fd2ad0cf1e03ef7842af2a85e8b622d0e4e4b654ef573f36cfc669b26719 (from https://www.govinfo.gov/content/pkg/FR-1996-05-14/pdf/96-12021.pdf)
- Federal Register: https://www.federalregister.gov/documents/1996/05/14/96-12021/airworthiness-directives-boeing-model-767-series-airplanes
- Page: https://openairdocs.org/proposed/96-NM-25-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Boeing Model 767 series airplanes, that currently requires inspections to detect cracking and corrosion of the aft trunnion of the outer cylinder of the main landing gear (MLG) and various follow-on actions. That action also provides for the optional termination of the inspections by repairing the outer cylinder and installing new aft trunnion bushings. That AD was prompted by reports of failure of several MLG due to fractures of the aft trunnion outer cylinders. The actions specified by that AD are intended to prevent the collapse of the MLG due to stress corrosion cracking of the aft trunnion of the outer cylinder. This proposed action would require operators to implement the previously optional terminating action.

## Notices in this docket

- May 14, 1996: Notice of proposed rulemaking (NPRM). (first notice), FR document 96-12021, comments due Jun 24, 1996 (https://www.federalregister.gov/documents/1996/05/14/96-12021/airworthiness-directives-boeing-model-767-series-airplanes)

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