AD 2001-04-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France Model EC120B | Airworthiness Directives; Eurocopter France Model EC120B Helicopters |
Unsafe Condition
A crack in the engine to main gearbox coupling tube assembly (tube), part number C631A1101101, could lead to tube failure, loss of engine drive, and a subsequent forced landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually check each affected tube for a crack within 5 hours time-in-service (TIS) and thereafter at intervals not exceeding 5 hours TIS. Replace any cracked tube with an airworthy tube before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5 hours time-in-service (TIS) and thereafter at intervals not exceeding 5 hours TIS.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter France Model EC120B helicopters equipped with engine to main gearbox coupling tube assembly (tube), part number C631A1101101, installed, certificated in any category.
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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