COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-28 Series Aeroplanes AD/PA-28/57 Nose Landing Gear Trunnion - Inspection 8/76 Applicability: All model 28R-200 with S/Nos. 7635001 to 7635249, 7635251 to 7635299, 7635302 to 7635318 and 7635321. In addition all models PA-28R-180 and PA-28R-200 that have had nose landing gear trunnion assembly P/N 67054-00V replaced since August 1975. Document: Piper SB No. 510. Compliance: Within 100 hours time in service after 31 August 1976.