AD 2020-24-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | Various | Airworthiness Directives; Airbus Helicopters |
Unsafe Condition
Corrosion of switches in the engine 'IDLE' or 'FLIGHT' control system could lead to engine power loss, making aborting an autorotation impossible, resulting in unintended touchdown.
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Required Actions
Inspect the wiring, perform an insulation test, inspect the pilot and copilot throttle twist grip controls, and test the pilot and copilot throttle twist grip controls for proper functioning. Install protection for micro-contacts (microswitches) 53Ka, 53Kb, and 65K (IDLE/FLIGHT mode).
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Compliance Time
Before the next autorotation training flight, 100 hours TIS, or 6 months, whichever occurs earlier.
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Affected Aircraft
Airbus Helicopters Model AS350B3, EC130B4, and EC130T2 helicopters with an ARRIEL 2B1 or ARRIEL 2D engine installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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