AD 2005-12-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | DHC-8-400 | Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes |
Unsafe Condition
Fatigue failures were discovered during type certification fatigue testing at the engine isolator bracket and at the orifice support tube, upper bearing, and piston plug in the shock strut assembly of the main landing gear (MLG), which are principal structural elements.
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Required Actions
Revise the Airworthiness Limitation section of the Instructions for Continued Airworthiness to reduce the life limits of the MLG orifice support tube, upper bearing, and piston plug. Incorporate structural inspection tasks to reduce the threshold for initiating repetitive detailed inspections for cracking of the engine isolator brackets.
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Compliance Time
Within 30 days after the effective date of this AD.
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Affected Aircraft
Bombardier Model DHC-8-400 series airplanes, certificated in any category; serial numbers 4001, and 4003 through 4094 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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