AD 2011-17-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France (ECF) Model EC120B | Airworthiness Directives; Eurocopter France (ECF) Model EC120B Helicopters |
Unsafe Condition
Simultaneously setting the emergency switch to the low position 'CUT-OFF' and the generator (GENE) pushbutton to 'OFF' position caused the starter-generator to restart, due to cross-wiring at the emergency switch. This could lead to the inability to isolate electrical equipment during an emergency, creating the risk of an uncontrolled electrical fire 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
Insert the appendix from the Emergency Alert Service Bulletin (EASB) into the Rotorcraft Flight Manual (RFM). Modify the emergency switch electrical wiring by reversing the wires and perform ground tests to ensure correct operation of the emergency switch. Remove the RFM emergency procedure appendix after completing the wiring modification and testing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight, insert the emergency procedure appendix into the RFM. Within 15 hours time-in-service (TIS) or 30 days, whichever occurs first, modify the emergency switch wiring, perform ground tests, and remove the RFM appendix.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter France (ECF) Model EC120B helicopters.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.