# Proposed AD 97-NM-53-AD: Boeing Model 767 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-10-08
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 5, 1998, 63 FR 41739
- Comments due: September 21, 1998
- Became: [AD 99-10-08](https://openairdocs.org/ad/99-10-08)
- Docket: 97-NM-53-AD
- FR document: 98-20834
- Official PDF: https://openairdocs.org/files/sha256/c6/d8/c6d82c89bef92d9bfa4aa5931560e16811629487343e4efb386efbb514a40e9a (from https://www.govinfo.gov/content/pkg/FR-1998-08-05/pdf/98-20834.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/08/05/98-20834/airworthiness-directives-boeing-model-767-series-airplanes
- Page: https://openairdocs.org/proposed/97-NM-53-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 767 series airplanes. This proposal would require a detailed visual inspection to detect corrosion inside the forward trunnion joint of the main landing gear (MLG); follow-on actions; and repair, if necessary. The proposal also provides for optional terminating action for the repetitive inspections. This proposal is prompted by reports of corrosion at the forward trunnion thrust face, tabs, and the internal threads of the forward trunnion of the MLG due to moisture in the forward trunnion joint. The actions specified by the proposed AD are intended to prevent corrosion of the forward trunnion joint, which could lead to a stress corrosion fracture of the forward trunnion and possible consequent collapse of the MLG.

## Notices in this docket

- Aug 5, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-20834, comments due Sep 21, 1998 (https://www.federalregister.gov/documents/1998/08/05/98-20834/airworthiness-directives-boeing-model-767-series-airplanes)

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