AD/A109/26 - Hydraulic System Return Line

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998) , PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Agusta A109 Series Helicopters AD/A109/26 Hydraulic System Return Line 4/96 Applicability: All model A109AII and A109C S/N range as listed in the Requirement Document. Requirement: Unless previously carried out, action in accordance with Agusta Bollettino Technico 109-98 Rev A dated October 26, 1995. Compliance: Prior to 30 June 1996. Background: The manufacturer has advised that disconnection of the quick release coupling in the number 1 hydraulic return line will cause lock-up of the hydraulic system. This condition can easily be detected if the flight manual preflight procedures are being followed.