# AD 79-10-12: Main Landing Gear Actuating System

- Type: Airworthiness directive
- Status: Current
- Products: Bombardier CL-44D4 and CL-44J
- Effective: May 18, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3471
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8D4E40C2365A0EC0862569A7006690DD.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-10-12

## The airworthiness directive

79-10-12 CANADAIR: Amendment 39-3471. Applies to all Canadair Models CL-44D4 and CL-44J certificated in all categories.

Compliance required prior to application for U.S. registration and airworthiness certification.

To preclude possible failure of the main landing gear actuating system, accomplish the following:

a) Inspect the end caps of the main landing gear actuator, Jarry Hydraulics, P/N 3650-3 or -7 (Canadair Assembly numbers 44-75129-800 or -802 respectively) for cracks using the dye penetrant method or an FAA approved equivalent inspection.

b) If cracks are found, replace end cap with a crack free cap prior to next flight.

This amendment is effective May 18, 1979.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A20](https://openairdocs.org/tcds/1A20): Bombardier Inc.; names 2 of 2 models: CL-44D4, CL-44J

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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