AD 2011-03-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model CL-215-1A10 (CL-215), CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model CL-215-1A10 (CL-215), CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) Airplanes |
Unsafe Condition
Seven cases of on-ground hydraulic accumulator screw cap or end cap failure have been experienced, resulting in loss of the associated hydraulic system and high-energy impact damage to adjacent systems and structure. The worst-case scenarios identified include impact damage to various components, potentially resulting in fuel spillage, uncommanded flap movement, or loss of aileron control.
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Required Actions
Within 50 flight hours after the effective date, inspect to determine the number of flight cycles accumulated by each applicable accumulator (brake, aileron, elevator, and rudder accumulators) with part number 08-8423-010 (MS28700-3). For Model CL-215-1A10 (CL-215) and CL-215-6B11 (CL-215T) airplanes, perform an ultrasonic inspection for cracking of the accumulator in accordance with the specified service bulletin.
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Compliance Time
Within 50 flight hours after the effective date
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Affected Aircraft
Bombardier, Inc. Model CL-215-1A10 (CL-215) airplanes, serial numbers 1001 through 1990; Model CL-215-6B11 (CL-215T Variant) airplanes, serial numbers 1056 through 1125; Model CL-215-6B11 (CL-415 Variant) airplanes, serial numbers 2001 through 2990, with part number 08-8423-010 (MS28700-3) accumulators installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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