# AD 91-14-23: Circuit Breakers

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 747-400 Series
- Effective: August 9, 1991
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-7063
- Docket: 91-NM-60-AD
- Registered aircraft: 38 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/826F765E228AEBED862569610072D533.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/91-14-23

## The airworthiness directive

91-14-23 BOEING: Amendment 39-7063. Docket No. 91-NM-60-AD.

Applicability: Model 747-400 series airplanes delivered with Door 5 Crew Rest Stations, certificated in any category.

Compliance: Required within 60 days after the effective date of this AD, unless previously accomplished.

To prevent the occurrence of smoke and fire in the Door 5 Crew Rest Station, accomplish the following:

A. Disconnect, cap, and stow the wires connected to circuit breakers C8823 and C8824 at the P84 circuit breaker panel, which provides electrical power to the crew rest bunk reading lights, Grimes Part Number 15-0175-9. Circuit breakers C8823 and C8824 must be collared in the open position and labeled INOPERATIVE.

B. An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Seattle ACO.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

This amendment (39-7063, AD 91-14-23) becomes effective on August 9, 1991.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20WE](https://openairdocs.org/tcds/A20WE): The Boeing Company; names 1 of 14 models: 747-400 Series

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 38 (38 by airframe model, 0 by engine model)
- Makers: Boeing 38

Models with the most aircraft:

- [Boeing 747-446](https://openairdocs.org/model/boeing-747-446): 10 aircraft (airframe model)
- [Boeing 747-422](https://openairdocs.org/model/boeing-747-422): 8 aircraft (airframe model)
- [Boeing 747-412](https://openairdocs.org/model/boeing-747-412): 5 aircraft (airframe model)
- [Boeing 747-409](https://openairdocs.org/model/boeing-747-409): 4 aircraft (airframe model)
- [Boeing 747-481](https://openairdocs.org/model/boeing-747-481): 3 aircraft (airframe model)
- [Boeing 747-443](https://openairdocs.org/model/boeing-747-443): 2 aircraft (airframe model)
- [Boeing 747-438](https://openairdocs.org/model/boeing-747-438): 2 aircraft (airframe model)
- [Boeing 747-428](https://openairdocs.org/model/boeing-747-428): 2 aircraft (airframe model)
- [Boeing 747-400](https://openairdocs.org/model/boeing-747-400): 1 aircraft (airframe model)
- [Boeing 747-451](https://openairdocs.org/model/boeing-747-451): 1 aircraft (airframe model)

All 10 models: https://openairdocs.org/ad/91-14-23/models.md
Every aircraft: https://openairdocs.org/ad/91-14-23/aircraft.md

Its text cites no advisory circulars or STCs.

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