Federal Register of Legislation
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES
Israel Aircraft Industries 1125 (Astra) Series Aeroplanes
AD/IAI-A/2 Aileron Autopilot Servo 1/2000 DM
Applicability: Models 1125 and Astra SPX aeroplanes with serial numbers 030 and 042 to 086 inclusive.
Requirement: 1. Check the attachment arm position of the SVO-85C autopilot aileron servo actuator.
2. If the position of the arm is found to be incorrect during the Requirement 1 check, inspect the arm, control link and bellcrank for damage and, if necessary, repair or replace the damaged parts.
3. Install a stopper angle.
Note 1: All actions are to be completed in accordance with Astra Alert Service Bulletin No 1125-27A-157.
Note 2: Israel CAA AD 27-99-10-06 refers.
Compliance: 1. Within 50 hours time in service from 8 December 1999.
2. Before further flight following the Requirement 1 inspection.
3. Within 50 hours time in service from 8 December 1999.
This Airworthiness Directive becomes effective on 8 December 1999.
Background: The Israel CAA has advised of an unsafe condition involving possible rolling oscillations during autopilot operation. A shorter attachment arm on a new type of autopilot aileron servo actuator allows operation beyond former travel limits, this in turn can drive a control link out of position causing actuation in the opposite direction of autopilot command.
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