# AD 48-12-01: Fire Prevention Requirements

- Type: Airworthiness directive
- Status: Current
- Products: Boeing C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC and DC-4
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 4 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/170CE11D3CE61E87862569BC00569A6E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/48-12-01

## The airworthiness directive

48-12-01 DOUGLAS: Applies to All C-54 and DC-4 Aircraft As Specified by Civil Air Regulations Amendments 41-3, 42-2, and 61-2.

To be accomplished not later than the dates specified in the above amendments as revised by special Civil Air Regulations Serial Nos. 385, 390, 390A, 390B and any subsequent regulations affecting these compliance dates.

All air carrier aircraft must be modified to comply with the fire prevention requirements as outlined in CAR Amendments 41-3, 42-2, and 61-2. The modifications outlined in the following listed Douglas Service Bulletins and AD 47-42-03 are required for compliance with these amendments. Other modifications shown to be equivalent to those covered by the Service Bulletins will also be acceptable.

Service Bulletin No. 62, Install Smoke Detector in Belly Baggage Compartment; Service Bulletin No. 66, Engine Section Piping and Fitting Revision; Service Bulletin No. 69, Installation of Enclosed Waste Container in Lavatory.

In addition to the above it will be necessary to ascertain that all interior materials and finishes comply with the applicable sections of CAR 4b. Safety Regulation Release 259 outlines acceptable procedures for complying with these particular requirements.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-762](https://openairdocs.org/tcds/A-762): The Boeing Company; names 7 of 7 models: C54E-DC, C54G-DC, C54B-DC, DC-4, C54A-DC, C54D-DC, C54-DC

## 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: 4 (4 by airframe model, 0 by engine model)
- Makers: Douglas 4

Models with the most aircraft:

- [Douglas C54D-DC](https://openairdocs.org/model/douglas-c54d-dc): 2 aircraft (airframe model)
- [Douglas C54E-DC](https://openairdocs.org/model/douglas-c54e-dc): 1 aircraft (airframe model)
- [Douglas C54G-DC](https://openairdocs.org/model/douglas-c54g-dc): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/48-12-01/models.md
Every aircraft: https://openairdocs.org/ad/48-12-01/aircraft.md

Its text cites no advisory circulars or STCs.

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