AD 2023-14-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | Helicopters Model EC155B1 | Airworthiness Directives; Airbus Helicopters |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Helicopters |
Unsafe Condition
Reports of failure of the main gearbox (MGB) oil cooling fan hub (fan hub). The unsafe condition, if not addressed, could result in an undetected loss of lubrication of the MGB or engine and reduced control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for cracks on and around the fan hub. Depending on the inspection results, perform additional inspections and replace an affected fan hub. If a crack is detected, remove each affected fan hub from service and replace it with a serviceable fan hub.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Airbus Helicopters Model EC155B1 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 4, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.