AD 71-20-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | Airworthiness Directives; CANADAIR Model CL-44D4 and CL-44J Aircraft |
| aircraft | Bombardier Inc. | CL-44J | Airworthiness Directives; CANADAIR Model CL-44D4 and CL-44J Aircraft |
Unsafe Condition
Cracks in the horizontal stabilizer front spar web, spar cap, and local structure at stations 22 left to 22 right.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect horizontal stabilizer front spar web, spar cap, and local structure for cracks using Canadair Service Information Circular No. 377-CL-44 (amended May 15, 1979) or equivalent. Repair or replace damaged parts before further flight if cracks are found. Use approved repair procedures from the Canadair CL-44D4 Structural Repair Manual or equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 300 hours time in service after the effective date of this AD, unless already accomplished within the last 4500 hours time in service and at intervals not exceeding 4800 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier Inc. Model CL-44D4 and CL-44J aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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