# Proposed AD 2001-NM-196-AD: McDonnell Douglas Model MD-90-30 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-11-02
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 3, 2003, 68 FR 9950
- Comments due: April 17, 2003
- Became: [AD 2003-11-02](https://openairdocs.org/ad/2003-11-02)
- Docket: 2001-NM-196-AD
- FR document: 03-4841
- Official PDF: https://openairdocs.org/files/sha256/69/69/6969db5ece73775027370b54b6dd59e7d84d961def701c8c7a47e9e71d91a21f (from https://www.govinfo.gov/content/pkg/FR-2003-03-03/pdf/03-4841.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/03/03/03-4841/airworthiness-directives-mcdonnell-douglas-model-md-90-30-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/035F4129B76DB03486256CDE0051612B.0001
- Page: https://openairdocs.org/proposed/2001-NM-196-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all McDonnell Douglas Model MD-90- 30 airplanes. This proposal would require replacement of the starter relay of the auxiliary power unit (APU) with a new, improved relay. This action is necessary to prevent failure of the APU starter relay, which could result in depleted main airplane batteries, overheated APU starters, and damage to the wiring adjacent to the APU starter. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Mar 3, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-4841, comments due Apr 17, 2003 (https://www.federalregister.gov/documents/2003/03/03/03-4841/airworthiness-directives-mcdonnell-douglas-model-md-90-30-airplanes)

---
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.