AD 2020-12-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc., Airplanes |
Unsafe Condition
The anti-fretting coating on the piston rods of certain ram air turbine (RAT) deployment actuators may have been incorrectly applied, which could cause the unit to seize and fail to fully deploy.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
A review of airplane maintenance records or an inspection of the RAT deployment actuator to determine the serial number, and depending on the findings, replacement with an upgraded RAT deployment actuator.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes.
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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