# Proposed AD 2001-NM-189-AD: Boeing Model 767-200, -300, and -300F Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-08-07
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 23, 2001, 66 FR 44313
- Comments due: September 24, 2001
- Became: [AD 2002-08-07](https://openairdocs.org/ad/2002-08-07)
- Docket: 2001-NM-189-AD
- FR document: 01-21225
- Official PDF: https://openairdocs.org/files/sha256/28/db/28db9a42b321e26fadb6de8c0d371d22b6f17513789f70c0370f7f4483b91121 (from https://www.govinfo.gov/content/pkg/FR-2001-08-23/pdf/01-21225.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/08/23/01-21225/airworthiness-directives-boeing-model-767-200--300-and--300f-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E81AC584D734BB2886256AB1007168B7.0001
- Page: https://openairdocs.org/proposed/2001-NM-189-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Boeing Model 767-200, -300, and -300F series airplanes. This proposal would require examination of maintenance records to determine if Titanine JC5A corrosion inhibiting compound ("C.I.C") was ever used; inspection for cracks or corrosion and corrective action, if applicable; repetitive inspections and C.I.C. applications; and modification of the aft trunnion area of the outer cylinder, which terminates the need for the repetitive inspections and C.I.C. applications. This action is necessary to prevent severe corrosion in the main landing gear (MLG) outer cylinder at the aft trunnion, which could develop into stress corrosion cracking and consequent collapse of the MLG. This action is intended to address the identified unsafe condition. The FAA is also planning to issue additional rulemaking to exclude the use of Titanine JC5A for compliance with previously issued ADs.

## Notices in this docket

- Aug 23, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-21225, comments due Sep 24, 2001 (https://www.federalregister.gov/documents/2001/08/23/01-21225/airworthiness-directives-boeing-model-767-200--300-and--300f-series-airplanes)

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