R22
What should be checked at a 100 hourly is listed in the R22 maintenance manual in detail in section 2 ( i think from memory ) titled inspections , providing the Log Book Statement says In Accordance With the Robinson Helicopter R22 Maintenance Manual ( which in nearly all cases it should ) it would also depend on the Maint. Manual revision at the time as it has changed over the years , I am no expert but have maintained the R22 for quite a few years .