Document ID: chunk:federal_register_of_legislation:F2006B02223:body:0:p2
Version: federal_register_of_legislation:F2006B02223
Segment Type: other
Provision Reference: 
Character Range: 3071–4169

from one channel to another channel (channel A to B) or the inability to shutdown an engine. Three uncommanded in-flight engine shutdowns, eight events in which the FADEC channels could not be changed and three events in which the engine could not be shut down prompted these actions. Allison Engine Company has determined that these events resulted from a quality problem with the internal power supply transistor TR1 in FADEC's with certain hardware SN's. This condition, if not corrected, could also result in an uncommanded in-flight engine shutdown and the potential for an in-flight dual-engine shutdown caused by a potential hardware failure mode in some AE 3007 series FADEC's.

            The FAA subsequently issued AD 2000-18-06 which required the modification of affected FADECs before 22 December 2000. This Directive is issued to ensure that any unmodified FADECs are not installed on any engine.

 Bernard Malcolm Hole
 Delegate of the Civil Aviation Safety Authority 20 July 2004

 The above AD is notified in the Commonwealth of Australia Gazette on 11 August 2004.