AD 2011-04-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 and 440) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 and 440) Airplanes |
Unsafe Condition
Wing leading edge thermal switches Part Number 601R59320-1 are not detecting bleed leaks at the design threshold, potentially leading to dormant failure and compromising wing leading edge structural integrity and wing anti-ice system effectiveness.
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Required Actions
Revise the Airworthiness Limitations section of the maintenance program by incorporating specified tasks from Bombardier Temporary Revisions 2A-49 and 2A-50 into the maintenance requirements manual. Perform a functional check of the wing leading edge thermal switches and inspect the wing anti-ice duct piccolo tubes.
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Compliance Time
Within 30 days after the effective date of the AD
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Affected Aircraft
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 and 440) airplanes, certificated in any category, serial numbers 7003 and subsequent.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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