Document ID: chunk:federal_register_of_legislation:F2007L03988:body:0:p3
Version: federal_register_of_legislation:F2007L03988
Segment Type: other
Provision Reference: 
Character Range: 5824–7930

For visual checks accomplished before the effective date of this AD - Within seven days after effective date of this AD.
                  b. For visual checks accomplished after the effective date of this AD - Within seven days after carrying out the inspection.
                  For Requirement 8 - Within 120 days after the effective date of this AD.
                  For Requirement 9 - As of the effective date of this AD.
             This Amendment becomes effective on 25 October 2007.
Background:  The United States federal Aviation Administration (FAA) has received a report of seven flight spoiler actuator jams on Model 737-800 Short Field Performance (SFP) aeroplanes.  The cause of the failure has been identified as interference within the actuator main control valve.
             The original issue of this is Directive was issued to detect and correct any spoiler panel that is found in the up position with the speedbrake handle in the down position, which could result in a spoiler actuator hardover and could cause the spoiler surface to jam in the fully extended position.  Two or more hardover failures of the spoiler surfaces in the up direction on the same wing, if undetected prior to takeoff, can cause significant roll and consequent loss of control of the aeroplane.
             Amendment 1 was issued following advice from the FAA that the incorrect spoiler actuator part numbers were inadvertently used in AD 2007-06-51 and were corrected in AD 2007-06-52.  These part number corrections were incorporated in Amendment 1.
             This amendment introduces a requirement to replace all flight spoilers with those of a higher dash number which is intended to eliminate the possibility of the unsafe condition occurring.

             The replacement of all flight spoiler actuators provides a terminating action to the requirements of this AD.

   The original issue of this AD became effective on 19 March 2007.
   Amendment 1 of this Directive became effective on 19 March 2007.

Charles Lenarcic
Delegate of the Civil Aviation Safety Authority

10 September 2007