# AD 46-27-01: Spar Webs

- Type: Airworthiness directive
- Status: Current
- Products: Boeing C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC and C54G-DC
- Superseded by: Nothing supersedes this AD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/4350B336C316DEB486256833004FA485.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/46-27-01

## The airworthiness directive

46-27-01 DOUGLAS: (Was Mandatory Note 5 of AD-762-7.) Applies to C-54 Series Aircraft.

To be accomplished not later than November 1, 1946.

Inspect immediately the spar webs in the wing integral tank area to ascertain if reinforcements have been installed in accordance with Douglas Service Bulletin C-54-205 dated October 1, 1945. If not already installed, reinforcements must be added by November 1, 1946. Pending rework, airplanes which do not have reinforcements may be operated if daily inspection shows there is no leakage. Fuel should be carried in outer wing tanks as cracks may develop that might not be detected.

## 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 6 of 7 models: C54E-DC, C54G-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: 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/46-27-01/models.md
Every aircraft: https://openairdocs.org/ad/46-27-01/aircraft.md

Its text cites no advisory circulars or STCs.

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