AD 2018-11-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc., Airplanes |
| aircraft | Bell | Various | Airworthiness Directives; Bombardier, Inc., Airplanes |
Unsafe Condition
Belleville washers installed on the shimmy damper of the main landing gear (MLG) may fail due to fatigue, potentially leading to shimmy damper performance compromise, MLG shimmy, and MLG failure.
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Required Actions
Revising the maintenance or inspection program to incorporate a repetitive task specified in the maintenance review board (MRB) report, which includes replacing Belleville washers at 20,000 flight cycles, during MLG overhaul, for aeroplanes that have passed the 20,000 flight cycle threshold, a phase-in period is defined.
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Compliance Time
Before further flight
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Affected Aircraft
All Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900) airplanes, and Model CL-600-2E25 (Regional Jet Series 1000) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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