# Proposed AD 2001-NM-226-AD: McDonnell Douglas MD-90-30 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-07-12
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 7, 2004, 69 FR 900
- Comments due: February 23, 2004
- Became: [AD 2004-07-12](https://openairdocs.org/ad/2004-07-12)
- Docket: 2001-NM-226-AD
- FR document: 04-273
- Official PDF: https://openairdocs.org/files/sha256/6a/a2/6aa238227cd81d272efde107fc481543f99632ed891b7b11b69a5f50861a76b1 (from https://www.govinfo.gov/content/pkg/FR-2004-01-07/pdf/04-273.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/01/07/04-273/airworthiness-directives-mcdonnell-douglas-md-90-30-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6FD35396EDF4197186256E1400533A88.0001
- Page: https://openairdocs.org/proposed/2001-NM-226-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model MD-90-30 airplanes. For some airplanes, the proposal would require replacing one 3-phase limiter block assembly, 6 current limiters, and hardware for 9 electrical cables with new parts. For other airplanes, this proposal would require inspecting 6 current limiters and 3 spare current limiters and replacing any defective current limiters with new current limiters. These actions are necessary to prevent overheating of the terminal studs on the 3-phase limiter blocks and associated current limiters, which could cause a fire in the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Jan 7, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-273, comments due Feb 23, 2004 (https://www.federalregister.gov/documents/2004/01/07/04-273/airworthiness-directives-mcdonnell-douglas-md-90-30-airplanes)

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