AD 2001-10-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Air | Tractor, Inc. AT-400, AT-500, and AT-800 Series | Airworthiness Directives; Air Tractor, Inc. AT-400, AT-500, and AT-800 Series Airplanes |
Unsafe Condition
Fatigue cracks in the wing lower spar cap, originating in the outboard 3/8-inch bolthole, could result in the wing separating from the airplane during flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the wing lower spar cap using eddy current methods for airplanes at or over the lower safe life limit. Replace or modify the wing lower spar cap if cracks are found. Terminate inspections when parts become available or after performing three repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the specified safe life limits (varies by model and serial number).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Air Tractor, Inc. AT-400, AT-500, and AT-800 series airplanes, with specific serial number ranges and safe life limits detailed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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