AD 2008-18-04
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, which 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, part number DSC228-16, to determine if they are marked LH7940T SPS 01. If marked, inspect inboard and outboard bolts for correct pre-load. Replace all hardware if pre-load is incorrect. If pre-load is correct, perform a visual inspection for cracking of the barrel nuts and cradles. Replace all affected barrel nuts and apply a certain compound to the affected barrel nuts and bolts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after February 13, 2008 (the effective date of AD 2008-04-02).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 airplanes, certificated in any category; serial numbers 4001 and 4003 through 4176 inclusive.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.