# Airworthiness Directives; Boeing Model 747 Series Airplanes Powered By Pratt & Whitney JT9D-7 Series Engines
> **Rule** · Final rule; request for comments. · Published 2000-09-01 · Effective 2000-09-18 · 65 FR 53161
## Document
- **Document number:** 00-22284
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 747 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 65 FR 53161
- **Publication date:** 2000-09-01
- **Effective date:** 2000-09-18
- **FAA docket:** Docket No. 2000-NM-270-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 747 series airplanes powered by Pratt & Whitney JT9D-7 series engines. This action requires inspection of the lugs on the bulkhead fitting of the rear engine mount, and corrective action, if necessary. This action is necessary to detect and correct bushing migration, corrosion, or cracking of the lugs on the bulkhead fitting of the rear engine mount, which could result in separation of the engine from the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/09/01/00-22284/airworthiness-directives-boeing-model-747-series-airplanes-powered-by-pratt-and-whitney-jt9d-7)
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