AD 2015-15-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
A timing error between the command and monitor channels in the spoiler electronic control unit (SECU) software, in combination with failure of the roll disconnect switch, could result in complete loss of spoiler functionality and consequent reduced controllability of the airplane.
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Required Actions
Revise the maintenance or inspection program to incorporate repetitive operational tests of the aileron disconnect system for spoiler functionality, and all applicable corrective actions. Modify and re-identify the SECU in accordance with Bombardier Service Bulletin 100-27-16.
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Compliance Time
Within 600 flight hours since the most recent operational test of the aileron disconnect system, or within 400 flight hours after the effective date, whichever occurs first, for the maintenance program revision. Within 1,600 flight hours or 48 months after the effective date, whichever occurs first, for the SECU modification.
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Affected Aircraft
Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes equipped with a spoiler electronic control unit (SECU) having part number C47330-006, C47330-007, or C47330-008, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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