# Proposed AD 96-NM-239-AD: Boeing Model 747-100, -200, and -300 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-08-05
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: January 21, 1997, 62 FR 2981
- Comments due: February 3, 1997
- Became: [AD 97-08-05](https://openairdocs.org/ad/97-08-05)
- Docket: 96-NM-239-AD
- FR document: 97-1293
- Official PDF: https://openairdocs.org/files/sha256/d5/9f/d59f1e5245324d426a159708b7d491b4a08f2429c0da34f78ac4c569b500ec5b (from https://www.govinfo.gov/content/pkg/FR-1997-01-21/pdf/97-1293.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/01/21/97-1293/airworthiness-directives-boeing-model-747-100--200-and--300-series-airplanes
- Page: https://openairdocs.org/proposed/96-NM-239-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain Boeing Model 747-100, -200, and - 300 series airplanes, that would have required the replacement of certain switches located behind the cabin attendant's panel at door 4 right, with new improved switches. That proposal was prompted by reports indicating that fires have occurred on some airplanes due to the internal failure of some of these switches. This action revises the proposed rule by adding a requirement to replace switches located at door 2 right. The actions specified by this proposed AD are intended to prevent the installation and use of switches that could short circuit when they fail, and consequently cause fire and smoke aboard the airplane.

## Notices in this docket

- Nov 29, 1996: Notice of proposed rulemaking (NPRM). (first notice), FR document 96-30412, comments due Jan 29, 1997 (https://www.federalregister.gov/documents/1996/11/29/96-30412/airworthiness-directives-boeing-model-747-100--200-and--300-series-airplanes)
- Jan 21, 1997: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 97-1293, comments due Feb 3, 1997 (https://www.federalregister.gov/documents/1997/01/21/97-1293/airworthiness-directives-boeing-model-747-100--200-and--300-series-airplanes)

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