100 series - All SID's inspections are due by 20 years old (disregarding hrs requirements)
100 series Private category are exempt by CASA until 30 June 2018.
(20 years is the longest period given by Cessna before first inspection is due, some are much less). With CASA 100 series exemption there will be several aircraft that have never had a SID done in around 60 years!
Nothing like a bit of a safety margin!
Dump the SID's and bring back the Major Inspection - A Mini Major at 5 years/ A Major Major at 10 years. (possible shorter for some operations like RPT and Airwork, and longer for others like Private operations)