# Proposed AD 2000-NM-147-AD: Boeing Model 777-200 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-09-02
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 29, 2000, 65 FR 82959
- Comments due: February 12, 2001
- Became: [AD 2001-09-02](https://openairdocs.org/ad/2001-09-02)
- Docket: 2000-NM-147-AD
- FR document: 00-33343
- Official PDF: https://openairdocs.org/files/sha256/cb/68/cb68ef1b3cce18bc3bcd612b75f3f1352172c0577b3d9b533bb0b4c95b7a9d9f (from https://www.govinfo.gov/content/pkg/FR-2000-12-29/pdf/00-33343.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/12/29/00-33343/airworthiness-directives-boeing-model-777-200-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D53B3EB43FAB1B8C8625729E0058B385.0001
- Page: https://openairdocs.org/proposed/2000-NM-147-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 777-200 series airplanes. This proposal would require replacement of certain existing bushings of the aft trunnion of the outer cylinder of the main landing gear (MLG) with new bushings, and replacement of grease in an undercut on the aft trunnion, if necessary. This action is necessary to prevent stress corrosion cracking and consequent fracture of the aft trunnion of the outer cylinder of the MLG, which could result in collapse of the MLG. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Dec 29, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-33343, comments due Feb 12, 2001 (https://www.federalregister.gov/documents/2000/12/29/00-33343/airworthiness-directives-boeing-model-777-200-series-airplanes)

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