# Proposed AD 2000-NM-330-AD: Boeing Model 747 Series Airplanes Powered By Pratt & Whitney JT9D-3 and -7 Series Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-15-02
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 15, 2001, 66 FR 10387
- Comments due: April 2, 2001
- Became: [AD 2001-15-02](https://openairdocs.org/ad/2001-15-02)
- Docket: 2000-NM-330-AD
- FR document: 01-3857
- Official PDF: https://openairdocs.org/files/sha256/fe/54/fe5419e6f1330787a424009510438271433243724f38be564d1f21bd0a105dc3 (from https://www.govinfo.gov/content/pkg/FR-2001-02-15/pdf/01-3857.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/02/15/01-3857/airworthiness-directives-boeing-model-747-series-airplanes-powered-by-pratt-and-whitney-jt9d-3-and
- Page: https://openairdocs.org/proposed/2000-NM-330-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that currently requires repetitive inspections and torque checks of the hanger fittings and strut forward bulkhead of the forward engine mount and adjacent support structure, and corrective actions, if necessary. The existing AD also provides for optional terminating action for the repetitive inspections and checks. This action would mandate certain new repetitive torque checks and the previously optional terminating action. The actions specified by the proposed AD are intended to prevent loose fasteners and associated damage to the hanger fittings and bulkhead of the forward engine mount, which could result in separation of the engine from the airplane.

## Notices in this docket

- Feb 15, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-3857, comments due Apr 2, 2001 (https://www.federalregister.gov/documents/2001/02/15/01-3857/airworthiness-directives-boeing-model-747-series-airplanes-powered-by-pratt-and-whitney-jt9d-3-and)

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