# AD 47-02-04: Engine Primer Solenoid

- 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- Superseded by: Nothing supersedes this AD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/B4F740DEE2BAA2E986256CC4006A5E2A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-02-04

## The airworthiness directive

47-02-04 DOUGLAS: (Was Mandatory Note 12 AD-762-7.) Applies to C-54 and DC-4 Aircraft.

To be accomplished not later than March 15, 1947.

Relocate engine primer solenoid to prevent fuel leaking into firewall junction box. This change shall be accomplished in accordance with item 25 of Douglas Service Bulletin C-54-266, dated May 17, 1946, or part 2A, item 4; and part 2C, item 12 of Douglas Service Bulletin DC-4 No. 66, dated June 18, 1947.

Revised May 24, 1948.

## 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/47-02-04/models.md
Every aircraft: https://openairdocs.org/ad/47-02-04/aircraft.md

Its text cites no advisory circulars or STCs.

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