As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RT ENGINE START IN MIA THERE WAS NO ROTATION. NO ADVANCE INDICATIONS OF ANY ISSUES. VERIFIED BLEED AIR AVAILABILITY AND START VALVE FUNCTION, FOUND OK. STARTER OIL LEVEL WAS GOOD. REMOVED AIR TURBINE STARTER AND FOUND SHAFT SHEARED. REMOVED RH ENGINE ATS PN 3506000-4 SN 430 AND INSTALLED OVERHAULED ATS PN 3506000-4 SN 793. ATS TT 3309.7 CYCLES 2279