AD 2012-20-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Incomplete fusion in the weld joint of the AC generator rotor band assembly may lead to rotor band failure, allowing rotor windings to contact the generator housing. This could result in debris contaminating and potentially blocking the engine oil scavenge system, leading to loss of oil pressure and an in-flight shutdown of the engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the left and right AC generators to determine the part number. If the AC generator has a part number identified in Bombardier Service Bulletin 84-24-45 or has P/N 1152218-3, replace the AC generator with a modified or new AC generator having P/N 1152218-6, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-24-45.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 6,000 flight hours or 36 months after the effective date of this AD, whichever occurs first.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes; certificated in any category; serial numbers 4001 through 4338 inclusive, with Honeywell AC generator part number (P/N) 1152218-3, 1152218-4, or 1152218-5 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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