COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 210 Series Aeroplanes AD/CESSNA 210/54 Wing Main Spar Attachment Fittings - Inspection Applicability: All model 210/T210 with S/No. 21058819 thru 21058968, T210-0198 thru T210-0338. Document: Cessna S.I.L. No. SE 83-28 Compliance: For fittings that have achieved 4000 hours T.I.S., inspect at next 100 hourly inspection and thereafter at intervals not exceeding 100 hours time in service. 1/84 Background: Cracking could occur in the wing attachment lugs, in particular the lower centre lugs.