# AD 47-10-20: Alcohol Tank Replacement

- Type: Airworthiness directive
- Status: Current
- Products: Lockheed 49-46
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6ECB133FEC7D98278625696D00458AA8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-10-20

## The airworthiness directive

47-10-20 LOCKHEED: (Was Mandatory Note 22 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2075.

Compliance required prior to June 1, 1947.

Replace all existing alcohol tanks with new type heavier tanks, LAC P/N 296424. Replace existing tank cradles with new cradles LAC P/N 296465.

(LAC Service Bulletin 49/SB-110, revised October 2, 1946, or subsequent, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-763](https://openairdocs.org/tcds/A-763): Lockheed Martin Aeronautics Company; names 1 of 6 models: 49-46

## 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: 1 (1 by airframe model, 0 by engine model)
- Makers: Lockheed 1

Models with the most aircraft:

- [Lockheed 49-46](https://openairdocs.org/model/lockheed-49-46): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/47-10-20/models.md
Every aircraft: https://openairdocs.org/ad/47-10-20/aircraft.md

Its text cites no advisory circulars or STCs.

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