AD 72-21-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | Airworthiness Directives; CANADAIR Model Canadair CL-44 |
| aircraft | Bombardier Inc. | CL-44J | Airworthiness Directives; CANADAIR Model Canadair CL-44 |
Unsafe Condition
Cracks in the horizontal stabilizer rear spar to fuselage attachment fittings, part numbers 44A45022A and B, could result in structural failure.
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Required Actions
Inspect the horizontal stabilizer rear spar to fuselage attachment fittings for cracks using Canadair Service Information Circular No. 379-CL44 or approved equivalent. Replace cracked parts with same part number or FAA-approved equivalents before further flight.
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Compliance Time
Within the next 100 hours in service after the effective date of this Airworthiness Directive, unless already accomplished within the last 1900 hours in service and at intervals not exceeding 2000 hours in service from the last inspection.
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Affected Aircraft
Bombardier Inc. Canadair 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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