As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS APU WONT START. MAINTENANCE FOUND POSITIVE CABLE AT APU STARTER BURNT OFF. PULLED CB L42 AND L41 ON PANEL 121VU FOR SAFETY. REPLACED WIRE TERMINALS TO APU STARTER, REPLACED APU STARTER IAW AMM 49-42-51. CONNECTED AND TORQUED WIRES TO APU STARTER. APU OPERATION CHECKS GOOD.