# Airworthiness Directives; Boeing Model 767 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 1999-03-26 · Effective 1999-04-12 · 64 FR 14578
## Document
- **Document number:** 99-7117
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 767 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 14578
- **Publication date:** 1999-03-26
- **Effective date:** 1999-04-12
- **FAA docket:** Docket No. 99-NM-39-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 767 series airplanes. This action requires repetitive inspections to detect cracking or damage of the forward and aft lugs of the diagonal brace of the nacelle strut, and follow-on actions, if necessary. This action also provides optional terminating action for the repetitive inspections. This amendment is prompted by a report that a fractured diagonal brace lug was found during a routine maintenance inspection. The actions specified in this AD are intended to detect and correct cracking of the diagonal brace of the nacelle strut, which could result in failure of the diagonal brace, and consequent fatigue failure of a strut secondary load path and separation of the engine and strut.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/03/26/99-7117/airworthiness-directives-boeing-model-767-series-airplanes)
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