AD 2016-24-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Cracked and corroded barrel nuts found at the mid-spar location of the horizontal-stabilizer-to-vertical-stabilizer attachment joint, which could compromise the structural integrity of the vertical-stabilizer attachment joints and lead to loss of control of the airplane.
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Required Actions
Conduct repetitive detailed inspections of each barrel nut and cradle, check the bolt torque of the preload indicating (PLI) washers, and take corrective action if necessary, including retorquing bolts and replacing barrel nuts. Inspect cracked or broken barrel nuts for damaged bores of the fittings and repair or replace as needed.
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Compliance Time
Before further flight
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes with serial numbers 4001 and subsequent.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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