AD 74-05-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | CANADAIR Models CL-44-D4 and CL-44-J Airplanes |
| aircraft | Bombardier Inc. | CL-44J | CANADAIR Models CL-44-D4 and CL-44-J Airplanes |
Unsafe Condition
Cracks in the main landing gear uplock actuator cylinder could result in inability to extend the landing gear.
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Required Actions
Modify aircraft per Canadair Service Bulletin No. CL-44-D4-381 with shimming requirements from Service Information Circular No. 317-CL-44-D4. Replace uplock cylinders before 8,000 hours in primary systems, track total service time, and inspect/reidentify cylinders reused in emergency systems.
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Compliance Time
Prior to accumulation of 3,500 hours time in service on the main landing gear uplock actuator cylinders
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Affected Aircraft
Bombardier Inc. CL-44D4 and CL-44J models, all serial numbers
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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