AD 2003-15-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France Model AS350B, B1, B2, B3, BA, and D | Airworthiness Directives; Eurocopter France Model AS350B, B1, B2, B3, BA, and D Helicopters |
Unsafe Condition
Neoprene seals bonded to the main gearbox (MGB) mobile cowlings have low fire resistance, which does not meet the certification criteria. This could allow a fire in the engine compartment to spread to the MGB compartment, containing parts that are not fire resistant, leading to loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the MGB opening neoprene cowling seals with glass/silicone seals in accordance with Eurocopter Alert Service Bulletin No. 53.00.31, dated July 11, 2002.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 200 hours time-in-service, unless accomplished previously.
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Affected Aircraft
Eurocopter France Model AS350B, B1, B2, B3, BA, and D helicopters, 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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