AD 68-26-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | Airworthiness Directives; CANADAIR Model CL-44D4 Airplanes |
Unsafe Condition
Cracks in stabilizer interspar ribs at Stations 123, 141, and 159 could lead to structural failure.
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Required Actions
Inspect rib caps of specified part numbers using a 5-power boroscope or equivalent. Replace or repair cracked parts before further flight. Compliance with Canadair Service Bulletin No. 286 may exempt repetitive inspections.
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Compliance Time
Within the next 100 hours time in service after the effective date, unless accomplished within the last 400 hours time in service, and at intervals not exceeding 500 hours time in service thereafter.
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Affected Aircraft
Bombardier Inc. Model CL-44D4 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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