# AD 73-11-05: Main Landing Gear

- Type: Airworthiness directive
- Status: Current
- Products: Israel Aircraft Industries 1121, 1121A and 1121B
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-1645
- Registered aircraft: 2 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/19D40FCEE776F3CF862569AC00693DA1.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-11-05

## The airworthiness directive

73-11-05 ISRAELI AIRCRAFT INDUSTRIES: Amdt. 39-1645. Applies to Model 1121 Series airplanes, S/N's 3 through 150, excluding S/N 107.

Compliance required prior to next takeoff.

To prevent the possible failure of a main landing gear

  (a) Visually inspect the trunnion bosses of the main landing gear upper body, P/N ES12845, for cracks using a mirror and flashlight.

  (b) If a crack is found in a main landing gear, before further flight, except that the airplane may be flown in accordance with FAR 21.197 to a base where the repair can be performed, replace that main landing gear with a serviceable part of the same part number or an FAA-approved equivalent, and report the finding of the crack on FAA Form 8330-2 to the Chief, Aircraft Certification Staff, Federal Aviation Administration (AEU-100), c/o U. S. Embassy, APO New York, New York 09667. (Reporting approved by the Bureau of the Budget under BOB No. 04-R0174).

NOTE: During the inspection required by paragraph(a) particular attention should be directed to the top of the trunnion boss along the forging flash or seam extending from the bushing face.

This amendment is effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective upon receipt of the airmail letter dated April 27, 1973, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A2SW](https://openairdocs.org/tcds/A2SW): Israel Aircraft Industries Ltd.; names 3 of 6 models: 1121, 1121A, 1121B

## 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: 2 (2 by airframe model, 0 by engine model)
- Makers: Aero Commander 2

Models with the most aircraft:

- [Aero Commander 1121](https://openairdocs.org/model/aero-commander-1121): 1 aircraft (airframe model)
- [Aero Commander 1121A](https://openairdocs.org/model/aero-commander-1121a): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/73-11-05/models.md
Every aircraft: https://openairdocs.org/ad/73-11-05/aircraft.md

Its text cites no advisory circulars or STCs.

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