AD 66-27-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | CL-44D4 | Airworthiness Directives; CANADAIR Model CL-44D4 Airplanes |
Unsafe Condition
Cracks in the main landing gear keel vertical posts and horizontal lower reinforcing angle members in the inboard nacelles could result in structural failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the vertical post members and nesting angles for cracks within 50 hours' time in service after the effective date, and thereafter every 500 hours' time in service. Repairs or replacements must be done in an FAA-approved manner before further flight if cracks are found. Discontinue inspections after approved modifications as specified.
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Compliance Time
within the next 50 hours' time in service after the effective date of this AD, unless already accomplished within the last 450 hours' time in service, and thereafter at intervals not to exceed 500 hours' time in service from the last inspection
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Affected Aircraft
Bombardier Inc. Model CL-44D4 airplanes
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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