What was found
AIRCRAFT WAS GROUNDED: "ELEC GEN OFF R2" DISPLAYED ON SYNOPTIC WOULD NOT RESET. MAINTENANCE FOUND ELECTRICAL ARC FLASH WITH HEAVY SOOT CONTAMINATION DISCOVERED ON OVER VOLTAGE TRANSIENT PROTECTION UNIT. **SUPPLEMENTAL REPORT FOR AALA202308024413: MAINTENANCE REPLACED P2 POWER DISTRIBUTION PANEL PER DMC-B787-A-24-09-70-05A-720A-A (AALA202308024413). REPLACED R1 AND R2 OVERVOLTAGE TRANSIENT PROTECTION UNITS PER AMM 24-09-08-00A-720A (AALA202308047690, AALA202308046894). REPLACED R1 AND R2 GENERATOR CONTROL UNIT PER AMM 24-22-02-01A-720A (AALA202308042930, AALA202308044626). REPLACED R2 VARIABLE FREQUENCY STARTER GENERATOR PER AMM 24-21-08 (AALA202308041359).** (CLOSED)