As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. P-11 CIRCUIT BREAKER H18 POPPED FUSE DURING POWER ON PROCESS. CIRCUIT BREAKER IS CURRENTLY POPPED (EMERGENCY LIGHTS 4L-4R). SUPPLEMENTAL REPORT: REPLACED R4 DOOR EMERGENCY LIGHT BATTERY PACK (AALA202010279028) AND POWER SUPPLY (AALA202101269019), PER AMM 33-51-06. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.