AD 83-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | Airworthiness Directives; CANADAIR Model CL-44D4 and CL-44J Airplanes |
| aircraft | Bombardier Inc. | CL-44J | Airworthiness Directives; CANADAIR Model CL-44D4 and CL-44J Airplanes |
Unsafe Condition
Cracks in the horizontal stabilizer rear attachment fittings (Part Numbers 44-A45022A and 44-A45022B) and reinforcing channels (Part Numbers 28-A24559A and 22-A24559B) could lead to structural failure of the horizontal stabilizer.
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Required Actions
Inspect the horizontal stabilizer rear spar attachment fittings and reinforcing channels for cracks at intervals not to exceed 2000 hours time in service, starting within the next 200 hours time in service. Replace fittings/channels with steel reinforcements (Parts 28-21312-2, -3, -4, -5) if cracks extend to or beyond half the lug width or per the Service Information Circular. Repeat inspections every 100 hours if cracks are found but less than half the lug width, and replace within 500 hours.
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Compliance Time
Within the next 200 hours time in service
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Affected Aircraft
Bombardier Inc. Model CL-44D4 and CL-44J airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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