AD 2017-11-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc., Airplanes |
Unsafe Condition
Moisture entering the electrical stage of the electro-hydraulic servo valve (EHSV), combined with a steering selector valve failure, could lead to uncommanded nose wheel steering and a consequent runway excursion at high speed.
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Required Actions
Inspect the part number of the steering manifold within 48 months after the effective date. Replace the steering manifold if necessary, following Bombardier Service Bulletin 100-32-25, Revision 01. Install a new mod plate if the existing one is missing or full.
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Compliance Time
Within 48 months after the effective date of the AD.
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Affected Aircraft
Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, as identified in Bombardier Service Bulletin 100-32-25, Revision 01.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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