AD 2014-05-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. |
Unsafe Condition
A batch of main landing gear (MLG) door actuators with part number 46830-7 and certain serial numbers could be assembled with the scraper installed backward, which could hinder the operation of the MLG alternate extension system (AES) and result in failure of the MLG AES on one side, leading to an unsafe asymmetrical landing configuration.
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Required Actions
Repetitive functional checks of the MLG AES must be performed. Eventually, certain MLG door actuators must be replaced with actuators that have either been reworked or do not have the specified serial numbers.
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Compliance Time
Within 50 flight hours after the effective date of the AD.
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Affected Aircraft
All Bombardier, Inc. Model DHC-8-400 series airplanes with MLG door actuators having part number 46830-7 and certain serial numbers as specified in Bombardier Service Bulletin 84-32-108, Revision A, dated October 1, 2012.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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