AD 2011-18-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model DHC-8-400 Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model DHC-8-400 Series Airplanes |
Unsafe Condition
Cracked barrel nuts at the front spar locations of the wing-to-fuselage attachment joints, and loose washers in the barrel nut assembly, could compromise the structural integrity of the wing-to-fuselage attachments.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a torque check to determine if the bolt preload is correct. If the preload is correct, conduct a detailed inspection of each barrel nut and cradle for cracking, pitting, or corrosion. Repeat the torque check and inspection at intervals not exceeding 2,000 flight hours or 12 months, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the specified compliance times, unless the actions have already been performed.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, certificated in any category, serial numbers 4001 and subsequent.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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