AD 2008-04-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | DHC-8-400 | Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes |
Unsafe Condition
Cracking in the barrel nuts at the four primary front spar wing-to-fuselage attachment joints could result in reduced structural integrity of the wing-to-fuselage attachments and consequent detachment of the wing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all barrel nuts to determine if they have a certain marking. Inspect affected bolts to determine if the bolts are pre-loaded correctly. Replace all hardware if the pre-load is incorrect. For airplanes with correct pre-load, perform repetitive visual inspections for cracking of the barrel nuts and cradles, and replace all hardware for cracked barrel nuts. Replace all hardware for certain affected barrel nuts that do not have cracking to end repetitive inspections. An optional replacement for all affected barrel nuts is also provided.
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Compliance Time
Before further flight
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Affected Aircraft
Bombardier Model DHC-8-400 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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