COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-23 (Apache and Aztec) Series Aeroplanes AD/PA-23/51 Amdt 1 Landing Gear Selector Lever - Inspection 3/79 Applicability: All models PA-23, PA-23-235 and PA-23-250 unless fitted with landing gear selector lever P/N 761-213. Requirement: Inspect landing gear lever P/N 752-303 for cracks in the vicinity of the two right- angle bends. Where adhesive tape has been used to secure the warning light wires to the lever, the tape shall not be replaced over the area between the bends. Note: Piper SB No. 635 refers to this subject. Compliance: At intervals not exceeding 100 hours time in service.