As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ONE TOOTH ON RING GEAR ASSEMBLY WAS MISSING, TOOTH BROKEN AT BASE, NO EVIDENCE OF DAMAGE ON STARTER PINION GEAR FOUND. NO EVIDENCE OF STARTER KICK BACK/ENGINE KICK BACK NOTED. NO OTHER DAMAGE NOTED ON ANY GEAR TEETH. SUSPECT QUALITY CONTROL AT POINT OF MANUFACTURE. (TC NR 20091126005)