AD 2012-21-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Failure of the screw caps and/or end caps of the hydraulic and parking brake accumulators, which could result in damage to the airplane's primary structures, with potential adverse effect on the airplane's controllability.
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Required Actions
Inspect the parking brake hydraulic accumulator to determine the part number and serial number. Replace the parking brake hydraulic accumulator if the part number cannot be determined or is identified in Goodrich Service Bulletin 08-60197-001-32-70 R2. Relocate the parking brake hydraulic accumulator as specified.
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Compliance Time
Within 1,200 flight hours or 6 months after the effective date of this AD, whichever comes first, for inspection. Within 6,000 flight hours after the effective date of this AD for relocation.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, certificated in any category, serial numbers 4001 through 4346 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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