Summary
This amendment proposes adopting a new airworthiness directive (AD) for Eurocopter France (ECF) Model EC130 B4 helicopters. This proposal would require, within 100 hours time-in-service (TIS), modifying and testing the wiring of the battery overheat sensing circuit. This proposal is prompted by a malfunction in the battery overheat sensing circuit found during a scheduled inspection. The actions specified by this proposed AD are intended to correct the connection of the thermal switch to the cockpit indicator light, to notify the flight crew of an overheated battery, and to prevent a thermal runaway of the battery, an in-flight fire, and subsequent loss of control of the helicopter.