# Airworthiness Directives; Boeing Model 777-200 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 1997-04-22 · Effective 1997-05-07 · 62 FR 19480
## Document
- **Document number:** 97-9881
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 777-200 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 62 FR 19480
- **Publication date:** 1997-04-22
- **Effective date:** 1997-05-07
- **FAA docket:** Docket No. 97-NM-60-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777-200 series airplanes. This action requires repetitive visual inspections of the forward mounts of certain engines to detect damaged, missing, or failed parts, and eventual modification of those engines. Accomplishment of this modification terminates the requirement for repetitive inspections. This amendment is prompted by a report indicating that bolts that attach the yoke of the forward mount to the fan case of the engine have failed due to fatigue cracking. The actions specified in this AD are intended to prevent fatigue cracking in these bolts, which could lead to failure of these bolts and consequent separation of the engine from the wing.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/04/22/97-9881/airworthiness-directives-boeing-model-777-200-series-airplanes)
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