AD 2010-07-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model BD-100-1A10 (Challenger 300) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model BD-100-1A10 (Challenger 300) Airplanes |
Unsafe Condition
Proximity-sensor electronic unit (PSEU) failure resulted in unannounced loss of wheel brakes below 10 knots, thrust reverser, nose wheel steering, and auto-deployment of multi-function spoilers, potentially reducing aircraft controllability upon landing and causing runway overrun.
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Required Actions
Revise the Limitations Section of the Bombardier Challenger 300 AFM, CSP 100-1, to include information from Bombardier Temporary Revision TR-39, dated March 2, 2005, introducing a procedure for 'PROX SYS FAULT (A)' and modifying 'WOW FAIL (C)' and 'GEAR SYS FAIL (C)' procedures. If the aircraft has a PSEU with software version 12 installed per Bombardier Service Bulletin 100-32-12, use Bombardier Temporary Revision TR-46, dated March 27, 2008, instead.
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Compliance Time
Within 14 days after the effective date of this AD (May 7, 2010)
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Affected Aircraft
Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes, serial numbers 20002 through 20153 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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