COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Agusta A109 Series Helicopters AD/A109/25 Amdt 1 Main Rotor Pitch Change Link Spherical Bearing 3/96 Applicability: Models A109C, all serial numbers up to and including 7677, excepting serial numbers 7633, 7654 and 7667; and A109K2, all serial numbers up to and including 10023 excepting serial number 10014. Models fitted with pitch control links P/N 109-0110- 71-107 are exempt from this Directive. Requirement: Action in accordance with Agusta Bolletinos Tecnico Telegrafico 109-9, or 109K-2, dated 23 March 1995, as applicable. Note: RAI AD 95-334 superseding RAI AD 95-083, and RAI AD 95-332 superseding RAI 95-082 refer. Compliance: For Model A109C: within 10 hours' time in service after 15 March 1995; thereafter at intervals not exceeding 100 hours' time in service. For Model A109K2: within 10 hours' time in service after the effective date of this Amendment, thereafter at intervals not exceeding 100 hours' time in service. This Amendment has effect from 29 February 1996. The initial Compliance for Model A109C remains unchanged. Background: Increases in vibration levels have been attributed to damage to the pitch change link spherical bearings. Amendment 1 clarifies the Applicability, adds the Model A109K, and provides terminating action.