Accessory Drive Gear Failure

[EZCOPE]

Revolt'n development!!
During routine maint. tried starting front eng - IO-360C- starter whirred, nothing else moved. Pulled starter, starter worm gear didn't act right. After consult with don George- ORL , and AC Specalties Services Tulsa - shipped to Tulsa. They found accessory drive gear cracked. AND there is a Continental SB - SB01-5 , but my engine SN not covered. Checked parts record from OH, no mention of that part. ZO, must be original part with 2700 hours on it, and over 39 years of age.

It could have gotten pricey, but AC Spec Sv managed to keep OH of the starter adapter for under $1400. One gear alone goes for 1000.