As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU KICKED OFF WHILE SITTING AT THE GATE, STRONG ODOR ( ELECTRICAL ODOR) BUT NO FAIL INDICATION OR APU LIGHTS. APU CONTINUED TO RUN BUT NO POWER. INSPECTED PER AMM 05-42. FOUND STARTER-GENERATOR CABLE COVER SEVERLY BURNING. REMOVED & REPLACED APU STARTER-GENERATOR PER B737 AMM 49-41. ALL OPS/LEAK/BITE CHECKS GOOD. (8937588) AIRCRAFT WAS GROUNDED