# AD 73-24-01: Control Surface Hinge Failure

- Type: Airworthiness directive
- Status: Current
- Products: Commander 112
- Effective: November 19, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1743
- Registered aircraft: 107 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/502D4828694F563B86256A38005DA97A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-24-01

## The airworthiness directive

73-24-01 ROCKWELL INTERNATIONAL: Amdt. 39-1743. Applies to Rockwell Commander Model 112 airplanes, Serial Numbers 3 through 120, certificated in all categories.

Compliance required before further flight unless already accomplished.

To prevent failure of the aileron hinges and/or the elevator trim tab hinges, accomplish the following:

  (a) Inspect all hinge halves of both ailerons and both elevator trim tabs from underside of aircraft to determine if the hinges are of the formed type made by rolling the edge of a 0.040 inches thick flat sheet or of the extruded type 0.060 inches thick.

  (b) If extruded hinge halves are found in all locations, no further action is required.

  (c) If a formed hinge piece is found, that complete hinge must be replaced with Rockwell Commander Part No. 42251-1 for the aileron hinges or Rockwell Commander Part No. 44020-5 for the elevator trim tab hinges before further flight. If no cracks are visually evident in any formed hinges,the airplane may be flown in accordance with FAR 21.197 to a base where the replacement can be performed.

Rockwell International Service Bulletin No. SB-112-6 pertains to this same subject.

This amendment becomes effective November 19, 1973.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A12SO](https://openairdocs.org/tcds/A12SO): Commander Aircraft Corporation; names 1 of 8 models: 112

## 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: 107 (107 by airframe model, 0 by engine model)
- Makers: Aero Commander 98, Rockwell International 9

Models with the most aircraft:

- [Aero Commander 112](https://openairdocs.org/model/aero-commander-112): 98 aircraft (airframe model)
- [Rockwell International 112](https://openairdocs.org/model/rockwell-international-112): 9 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/73-24-01/models.md
Every aircraft: https://openairdocs.org/ad/73-24-01/aircraft.md

Its text cites no advisory circulars or STCs.

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