As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RAMP REPORTED LONGITUDINAL PDU 3LT & RT & 4LT & RT. A4 & A6 CARD FILES ARE VIOLENTLY BURNING UP & HAS CREATED EXCESSIVE INTERIOR HEAT & SMOKE DAMAGE TO CTR CARGO CTL UNIT. ALSO SLAVED IN KNOWN GOOD A12 CARD FILE TO POS A6, & IT BURNED UP AS WELL. CTR CARGO CTL UNIT NEEDS TO BE REPLACED, ALL ASSOC WIRES CHECKED. WIRE CHECKS & TROUBLESHOOTING CONTINUES. INSTALLED CTR CARGO CTL UNIT U1-149 & TESTED NORMAL, ALL CB'S STAY IN IAW AMM 25-57-41-4.