What was found
(CAN) DURING DISASSEMBLY, THE RING GEAR PN: S6135-22017-003 WAS FOUND TO BE CRACKED. ALONG WITH THE RING GEAR, ONE OF THE MOUNTING STUDS WAS BROKEN AND ONE OF THE MS21045-5 MOUNTING NUTS WAS CRACKED. ALSO 3 OF THE BRG SUPPORT MOUNTING STUD HOLE BUSHINGS, IN THE SAME LOCATION THAT THE CRACKS WERE FOUND ON THE RING GEAR, WERE CRACKED. WAS LAST O/H IN FEB 2002 TECH REP CONTACTED. PRM NOTIFIED AND GEARBOX HELD IN SHORT TERM QUARANTINE PENDING TCCA/OEM RECOMENDATIONS - 23RD OCT 2009. OEM HAS REQUESTED RING GEAR AND ASSOCIATED HARDWARE FOR ENGINEERING EVALUATION. TCCA HAS AUTHORIZED US TO PROCEED WITH REPAIR AND O/H OF MGB -27TH OCT ,2009 MAIN GEARBOX PN S6135-20600-046.