Document ID: chunk:federal_register_of_legislation:F2006L02289:body:0:p2
Version: federal_register_of_legislation:F2006L02289
Segment Type: other
Provision Reference: 
Character Range: 2979–5680

incorporated in Revision 17 of Part 2, AWL's, dated 19 April 2005, of the Series 100 Maintenance Program Manual.
             Note 2:  Installation of Modsum 8Q100898, in accordance with the original issue, Revision A, B, C or D of Bombardier Service Bulletin 8-27-89, prior to the effective date of the Directive, is considered acceptable for compliance with Requirements 1 and 2 for installation of this particular Modsum.
             Note 3:  Installation of Modsum 8Q101443, in accordance with Revision C or D of Bombardier Service Bulletin 8-27-89, prior to the effective date of the Directive, is considered acceptable for compliance with Requirement 2 for installation of this particular Modsum.
             Note 4:  Installation of Modsum 8Q101445, in accordance with the original issue of Bombardier Service Bulletin 8-27-103, prior to the effective date of the Directive, is considered acceptable for compliance with Requirement 3 for installation of this particular Modsum.
             Note 5:  Transport Canada AD CF-2006-13 refers.
Compliance:  For Requirements 1, 2 and 3 - Within 24 months after the effective date of this Directive.
             This Airworthiness Directive becomes effective on 3 August 2006.
Background:  Bombardier Aerospace identified that a roll spoiler cable failure could result in an unacceptable amount of roll spoiler deflection, which could result in reduced controllability of the aircraft.  To address this condition, Modsum 8Q100898 was issued to introduce a spoiler cable disconnect sensing device.  This modification has been installed in production on aircraft serial numbers 562 and subsequent.  An associated operational check has also been introduced (See Note 1).

             In addition, Modsum 8Q101443 was issued to address a potential spoiler cable interference condition on aircraft S/N 003 through 123, 125 through 130, 132 through 136, 138 and 139, which do not yet have a spoiler cable tension regulator (Mod 8/0708) installed.

   Following incorporation of the spoiler cable disconnect sensing device on several aircraft, it was noted that, in the event of a spoiler cable failure, only the ROLL SPLR INBD HYD caution light will be illuminated until the aircraft speed decreases below 135 kts, at which time the ROLL SPLR OUTBD HYD caution light will also be illuminated.  Modsum 8Q101445 has been issued to rework the sensing circuit caution light indication to ensure that it is consistent for spoiler cable disconnects above and below 135 kts.  This modification has been installed in production on aircraft serial numbers 600 and subsequent.

James Coyne
Delegate of the Civil Aviation Safety Authority

22 June 2006