AD 2014-05-28
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Excessive wear on the lower latch surface of the main landing gear (MLG) up-lock hook could prevent the successful extension of the MLG using the primary landing gear extension system, which in combination with an alternate extension system failure could result in the inability to extend the MLG.
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Required Actions
Revise the maintenance or inspection program, as applicable, to incorporate the information in Bombardier Temporary Revision MRB-66, dated December 7, 2011, to Section 1-32, Systems/Powerplant Maintenance Program of MRB Report Part 1, Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7. This revision includes adding a functional check of the main landing gear up-lock assembly latch to the maintenance program.
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Compliance Time
Within the initial compliance time specified in the AD, which is not explicitly stated in the provided text.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400 series airplanes with main landing gear up-lock assembly part numbers 46500-7 and 46500-9.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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