AD 2003-21-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France Model AS355E, F, F1, F2, and N | Airworthiness Directives; Eurocopter France Model AS355E, F, F1, F2, and N Helicopters |
Unsafe Condition
Failure of the main gearbox (MGB) pump, seizure of the MGB, loss of drive to an engine and main rotor, and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check the MGB magnetic chip detector plug for sludge and the MGB oil-sight glass for dark oil. Inspect the lubrication pump if sludge is found or oil appears dark. Replace the MGB and pump if specific conditions (e.g., crank pin play, out-of-round bushing, gear pinion offset, metal chips, or wear) are detected. Ensure any installed MGB or pump meets AD requirements.
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
Eurocopter France Model AS355E, F, F1, F2, and N helicopters with a main gearbox lubrication pump, part number 355A32-0700-00, -01, -01M, 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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