AD 2005-04-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes and Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) Series Airplanes |
Unsafe Condition
Even small amounts of frost, ice, snow, or slush on the wing leading edges or forward upper wing surfaces can cause an adverse change in the stall speeds, stall characteristics, and the protection provided by the stall protection system, resulting in reduced controllability of the airplane.
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Required Actions
Revise the airplane flight manuals to include a new cold weather operations limitation. The revision must emphasize the requirement for an aerodynamically clean airplane during cold weather operations, including a tactile check to determine that the wing is free from frost, ice, snow, or slush when certain weather conditions exist.
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Compliance Time
Within 5 days after the effective date of this AD.
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Affected Aircraft
Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes and Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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