# Proposed AD 2001-NM-77-AD: Various Transport Category Airplanes Manufactured by McDonnell Douglas

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-17-07
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 20, 2003, 68 FR 8155
- Comments due: April 7, 2003
- Became: [AD 2003-17-07](https://openairdocs.org/ad/2003-17-07)
- Docket: 2001-NM-77-AD
- FR document: 03-4028
- Official PDF: https://openairdocs.org/files/sha256/28/e8/28e88b4ddf0df8d02aed5953da30823e9cb0fda5282b71200292585ffb8bd3ff (from https://www.govinfo.gov/content/pkg/FR-2003-02-20/pdf/03-4028.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/02/20/03-4028/airworthiness-directives-various-transport-category-airplanes-manufactured-by-mcdonnell-douglas
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1D0A704EECC05F7886256CD3005B01D6.0001
- Page: https://openairdocs.org/proposed/2001-NM-77-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to various transport category airplanes manufactured by McDonnell Douglas. This proposal would require a one-time test of the fire extinguishers for the engine and auxiliary power unit (APU) to determine the capability of the firex electrical circuits to fire discharge cartridges, and troubleshooting actions, if necessary. This action is necessary to prevent failure of the fire extinguishers to fire discharge cartridges, which could result in the inability to put out a fire in an engine or in the APU. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Feb 20, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-4028, comments due Apr 7, 2003 (https://www.federalregister.gov/documents/2003/02/20/03-4028/airworthiness-directives-various-transport-category-airplanes-manufactured-by-mcdonnell-douglas)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.