COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Agusta A109 Series Helicopters AD/A109/10 Nose Landing Gear Actuator 12/87 Applicability: All Model A109A and A109AII Helicopters. Requirement: Action in accordance with Agusta Bollettino Tecnico No. 109-62, Revision A. Note: RAI AD No 87-93/A109-43 refers. Compliance: As per the Requirement Document. Background: Additional maintenance, particularly where operations are conducted in highly humid and saline conditions, is required the nose gear retraction servo to prevent the nose landing gear collapsing during ground operation.