AD 2021-03-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc., Airplanes |
Unsafe Condition
Failure of a certain fire detection and extinguishing (FIREX) control unit.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace any FIREX control unit having part number (P/N) 474112-2 with a unit having P/N 474112-3, in accordance with paragraphs 2.B.(1) and (3) of the Accomplishment Instructions of the applicable Bombardier service bulletin.
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Compliance Time
Within 24 months after the effective date of this AD
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Affected Aircraft
Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20500 inclusive, and 20501 through 20669 inclusive, fitted with fire detection and extinguishing (FIREX) control unit part number (P/N) 474112-2.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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