# Proposed AD 99-NM-287-AD: McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 Series Airplanes; and C-9 (Military) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-25-04
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 5, 2001, 66 FR 30101
- Comments due: July 20, 2001
- Became: [AD 2002-25-04](https://openairdocs.org/ad/2002-25-04)
- Docket: 99-NM-287-AD
- FR document: 01-14002
- Official PDF: https://openairdocs.org/files/sha256/78/d4/78d489881dae2c960dda2d3f2fb371676180492e209e851d9538e8fab6e3560a (from https://www.govinfo.gov/content/pkg/FR-2001-06-05/pdf/01-14002.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/06/05/01-14002/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30--40-and--50-series-airplanes-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/56FCDFC9ACB9E5AB86256A64006E6EA4.0001
- Page: https://openairdocs.org/proposed/99-NM-287-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model DC-9-10, -20, -30, -40, and -50 series airplanes; and C-9 (military) airplanes. This proposal would require a one-time visual inspection of circuit breakers to determine the manufacturer of the circuit breakers, and corrective action, if necessary. This action is necessary to prevent internal overheating and arcing of circuit breakers and airplane wiring due to long-term use and breakdown of internal components of the circuit breakers, which could result in smoke and fire in the flight compartment and main cabin. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Jun 5, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-14002, comments due Jul 20, 2001 (https://www.federalregister.gov/documents/2001/06/05/01-14002/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30--40-and--50-series-airplanes-and)

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