# AD 43-12-01: Elevator Hinge Brackets

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC3A-S1C3G, DC3A-S1CG, DC3A-S4C4G, DC3A-SC3G and DC3A-SCG
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 7 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8FA6568933C2D0478625683200727014.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/43-12-01

## The airworthiness directive

43-12-01 DOUGLAS: (Was Service Note 4 of AD-669-3.) Applies to DC3A aircraft.

At each periodic inspection, check the elevator hinge brackets and if cracks are present the brackets should be replaced. Due to the possibility of vibration causing fatigue failures, continuous operation of the airplanes in the range of engine speeds between 1,300 and 1,600 r.p.m. should be avoided. A minimum engine speed of 1,700 r.p.m. during cruising flight is recommended.

(Douglas Service Letter dated January 15, 1943, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-669](https://openairdocs.org/tcds/A-669): The Boeing Company; names 5 of 10 models: DC3A-S1C3G, DC3A-SCG, DC3A-SC3G, DC3A-S1CG, DC3A-S4C4G

## 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: 7 (7 by airframe model, 0 by engine model)
- Makers: Douglas 7

Models with the most aircraft:

- [Douglas DC-3A-S1C3G](https://openairdocs.org/model/douglas-dc-3a-s1c3g): 5 aircraft (airframe model)
- [Douglas DC3A-S4C4G](https://openairdocs.org/model/douglas-dc3a-s4c4g): 2 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/43-12-01/models.md
Every aircraft: https://openairdocs.org/ad/43-12-01/aircraft.md

Its text cites no advisory circulars or STCs.

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