Document ID: chunk:federal_register_of_legislation:F2006L02984:body:0:p2
Version: federal_register_of_legislation:F2006L02984
Segment Type: other
Provision Reference: 
Character Range: 2827–4697

GCU with a new GCU, P/N 45AS88801-19 or -25, and inspect to determine the P/N of both current sense transformers on the lower in-board quadrant of the left-hand and right-hand engine inlets, in accordance with SB 24-3713.
                  a. If both current sense transformers have P/N 45AS88801-21, no further action is required by this Directive.
                  b. If either current sense transformer is not identified with P/N 45AS88801-21, replace the current sense transformer with a new transformer, P/N 45AS88801-21, in accordance with SB 24-3713.
             Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2006-15-16, are considered acceptable for compliance with the equivalent Requirements of this Directive.
             Note:  FAA AD 2006-15-16 Amdt 39-14697 refers.
Compliance:  For Requirements 1, 2, 3, 4 and 5 - Within 200 hours time in service or 6 months after the effective date of this Directive, whichever occurs first.
             This Airworthiness Directive becomes effective on 28 September 2006.
Background:  The FAA has reports of over-voltage conditions of the direct current (DC) starter generator.  This Directive requires, among other actions, reviewing the aeroplane logbook to determine whether certain generator control unit (GCU) installation kits are installed and, if necessary, replacing any incorrect GCU.
             The Directive is issued to prevent such over-voltage conditions due to the incompatibility between certain GCUs, which could result in the loss of normal electrical power, damage to some electrical components, or blown fuses during flight, together with a possible unrecoverable loss of some or all essential equipment.

James Coyne
Delegate of the Civil Aviation Safety Authority

14 August 2006