# AD 48-14-04: Tailpipe Shroud Deflector

- Type: Airworthiness directive
- Status: Current
- Products: Boeing C54-DC, C54A-DC, C54B-DC, C54D-DC and C54E-DC
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 3 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/338EAE5B9D4E9A89862569BC0056E777.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/48-14-04

## The airworthiness directive

48-14-04 DOUGLAS: Applies to All C-54 Series Aircraft Prior to Model C-54G.

Compliance required by November 1, 1948.

Because of fire hazard install a tailpipe shroud deflector on each tailpipe shroud assembly to prevent flame from a zone 1 fire entering the engine accessory section through the space existing between the shroud and cowling. AN 3-3A bolts may be substituted for the AN 3C-3A bolts called out in the Service Bulletin.

(Douglas Service Bulletin C-54-289 addendum covers this same subject.)

## 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 5 of 7 models: C54E-DC, C54B-DC, 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: 3 (3 by airframe model, 0 by engine model)
- Makers: Douglas 3

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)

All 2 models: https://openairdocs.org/ad/48-14-04/models.md
Every aircraft: https://openairdocs.org/ad/48-14-04/aircraft.md

Its text cites no advisory circulars or STCs.

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