AD 2012-20-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Failure of the main landing gear (MLG) to extend and lock, which could adversely affect the safe landing of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and trim the edge of the bumper plate, including performing a detailed visual inspection for damage or cracks of the bumper plate and base fitting, and replacing any damaged or cracked part. For airplanes with specific bumper plates, reidentify the bumper plate and perform an operational check of the alternate extension system of the main landing gear (MLG), repairing if necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 2,000 flight hours after September 19, 2011, for all airplanes. Within 1,000 flight hours after September 19, 2011, for airplanes with specific bumper plates.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, certificated in any category, having serial numbers 4001 through 4247 inclusive.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.