# Proposed AD 2002-NM-207-AD: Boeing Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, 747SR, and 747SP Series Airplanes Equipped With Pratt & Whitney JT9D-3, -7, -7Q, and -7R4G2 Series Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-07-19
- Products: Boeing
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: February 6, 2004, 69 FR 5781
- Comments due: March 2, 2004
- Became: [AD 2004-07-19](https://openairdocs.org/ad/2004-07-19)
- Docket: 2002-NM-207-AD
- FR document: 04-2477
- Official PDF: https://openairdocs.org/files/sha256/6c/8d/6c8d805d4925a6d563cbef28bb395b19f7325cbfde35aed895a545ec9b0d8387 (from https://www.govinfo.gov/content/pkg/FR-2004-02-06/pdf/04-2477.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/02/06/04-2477/airworthiness-directives-boeing-model-747-100--100b--100b-sud--200b--200c--200f--300-747sr-and-747sp
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/24D1588F373E2E3E86256E32005C8B78.0001
- Page: https://openairdocs.org/proposed/2002-NM-207-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain Boeing transport category airplanes listed above, that would have required drilling witness holes through the cowl skin at the cowl latch locations in the left-hand side of the cowl panel assembly of each engine. This new action revises the proposed rule by adding certain airplanes and removing certain JT9D engines from the applicability. The actions specified by this new proposed AD are intended to prevent improper connection of the latch, which could result in separation of a cowl panel from the airplane. Such separation could cause damage to the airplane, consequent rapid depressurization, and hazards to persons or property on the ground. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Jul 9, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-17318, comments due Aug 25, 2003 (https://www.federalregister.gov/documents/2003/07/09/03-17318/airworthiness-directives-boeing-model-747-100--100b--100b-sud--200b--200c--200f--300-747sr-and-747sp)
- Feb 6, 2004: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 04-2477, comments due Mar 2, 2004 (https://www.federalregister.gov/documents/2004/02/06/04-2477/airworthiness-directives-boeing-model-747-100--100b--100b-sud--200b--200c--200f--300-747sr-and-747sp)

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