Document ID: chunk:federal_register_of_legislation:F2006L02986:body:0:p2
Version: federal_register_of_legislation:F2006L02986
Segment Type: other
Provision Reference: 
Character Range: 5467–10693

bulletins identified in Table 2 are considered acceptable for compliance with the corresponding actions specified in this Directive.
                                   Table 2 - Previous Issues of Service Bulletins
                                   Service Bulletin                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   Revision                                                                                                          Date
 Special Attention SB 737-33-1133    Original                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           19 December 2002
 SB 737-33-1133                      Revision 1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         17 April 2003
 SB 737-33-1133                      Revision 2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         4 December 2003
 Special Attention SB 737-33-1132    Original                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           20 March 2003
 Special Attention SB 737-33-1132    Revision 1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         4 March 2004
                                   Later revisions of the above SB(s), approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2006-15-18, are considered acceptable for compliance with the equivalent Requirements of this Directive.
                                   Note:  FAA AD 2006-15-18 Amdt 39-14699 refers.
Compliance:                        For Requirement 1 - Within 48 months after the effective date of this Directive.
                                   For Requirement 2 - Prior to or concurrently with accomplishment of Requirement 1.
                                   This Airworthiness Directive becomes effective on 28 September 2006.
Background:                        The FAA has received a report that the master dim and test system circuit does not have wiring separation of the test ground signal for redundant equipment in the flight compartment.  This lack of separation could allow a single fault failure in flight to simulate a test condition and show test patterns instead of the selected radio frequencies on the communications panels, which could inhibit communication between the flight crew and air traffic control, affecting the continued safe flight of the aeroplane.

   This Directive requires the modification of the wiring for the master dim and test system and for certain aeroplanes, related concurrent actions as necessary.

James Coyne
Delegate of the Civil Aviation Safety Authority
14 August 2006