AD 2009-04-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier 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).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the inrush current to verify the AOA heating capability and replace inaccurately calibrated AOA transducers.
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Compliance Time
Within 7,500 total flight hours accumulated or before further flight, whichever occurs first.
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Affected Aircraft
Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, serial number 7003 and subsequent, certificated in any category, equipped with Thales angle of attack (AOA) transducers having part number 45150340 or C16258AA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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