# AD 47-10-25: Generator Mounting Bolts

- 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- Superseded by: Nothing supersedes this AD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/B328397BFA9F53F88625696D00458C7A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-10-25

## The airworthiness directive

47-10-25 LOCKHEED: (Was Mandatory Note 28 of AD-763-3.) Applies to All Model 49 Serials Incorporating Eclipse Type 1193, Model 1, Style A Generators on Which the Serial Numbers Are Not Followed by the Letter "M".

Compliance required prior to March 1, 1947.

Replace the 12 mounting head-to-yoke bolts in each generator with new 1/4-inch bolts (P/N 63937 referred to in Eclipse-Pioneer Bulletin No. 70).

(LAC Service Bulletin 49/SB-64 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/47-10-25/models.md
Every aircraft: https://openairdocs.org/ad/47-10-25/aircraft.md

Its text cites no advisory circulars or STCs.

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