As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AT START OF TAKEOFF ROLL WITH ENGINES SPOOLING UP LEFT SOURCE OFF LIGHT ILLUMINATED. ABORTED TAKEOFF. REMOVED AND REPLACED AUXILIARY POWER UNIT MODULE (AALA202207131223) PER AMM 24-24-51. REMOVED AND REPLACED AUXILIARY POWER BREAKER PER AMM 24-24-41.