AD 2010-08-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes |
Unsafe Condition
The heating capability of several Angle Of Attack (AOA) transducer heating elements is below the minimum requirement, and a large number of AOA transducers repaired in an approved maintenance facility were not calibrated accurately. Inaccurate calibration of the AOA transducer and/or degraded AOA transducer heating elements can result in early or late activation of the stall warning, stick shaker, and stick pusher by the Stall Protection Computer (SPC).
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Required Actions
Inspect the inrush current to verify the AOA heating capability, replace transducers with certain serial numbers, perform repetitive inspections of the inrush current for certain AOA transducers, and replace inaccurately calibrated AOA transducers.
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Compliance Time
Before further flight
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Affected Aircraft
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, serial numbers 7003 and subsequent, certificated in any category, equipped with Thales angle of attack (AOA) transducers having part number (P/N) 45150340 or C16258AA.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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