“WINDSHIELD WIPERS INOPERATIVE”“WINDSHIELD WIPERS INOPERATIVE”

“WINDSHIELD WIPERS INOPERATIVE”

2. Helicopters S/N 14017 to 14021 inclusive \- Modify the windshield wiper electrical system in accordance with Part II of Alert Bollettino Tecnico 119-5.
3. Helicopters S/N up to and including 14022, but excluding S/N 14017, 14018, 14019, 14020 and 14021 \- Modify the windshield wiper electrical system in accordance with Part III of Alert Bollettino Tecnico 119-5.

Note: Italian Ente Nazionale per l’Aviazone Civile AD 2002-309 refers.

Compliance: For Requirement 1 - Within five hours’ time in service after the effective date of this Directive.

For Requirement 2 - Before 31 October 2002.

For Requirement 3 - When relay part number (P/N) T412-DJ1001-C is replaced with relay P/N TDH-8070-1001P and/or T412-2006.

This Airworthiness Directive becomes effective on 21 June 2002.

Background: Agusta has advised that during a ground functional test of an A109E helicopter the windshield wiper electrical system overheated due to a system overload. The source of the overload was identified as a partial incompatibility of new timed relays P/N TDH-8070-1001P and/or T412-2006 (identified as K8651 and K8652) with the actual configuration of the windshield wiper electrical system.