Document ID: chunk:federal_register_of_legislation:F2006L00234:body:0:p2
Version: federal_register_of_legislation:F2006L00234
Segment Type: other
Provision Reference: 
Character Range: 2871–3986

This Airworthiness Directive becomes effective on 31 January 2006.
Background:  Two types of events have been observed in service:

             Temporary loss of braking efficiency at landing which was recovered after fully releasing the brakes and reapplying braking force.

             Display shortly after take off of a red "BOTH BRAKE SYSTEM" CAS message associated with "BRAKE COMPTR#1 FAULT CODE" and "BRAKE COMPTR#2 FAULT CODE" CAS message.

             Both types of events have been linked to incorrect data being transmitted between the IRS and the Brake System Control Unit.  This results in a failure of the BSCU to provide accurate use of the anti skid system and a reduction in braking efficiency.

             Loss of efficiency in braking may jeopardize the certificated take off and landing performances.

             This AD proposes to add runway length penalties at take off and landing to the AFM of the affected aircraft until a wiring modification is incorporated to directly link the IRS to the BSCU.

James Coyne
Delegate of the Civil Aviation Safety Authority

24 January 2006