As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURNBACK - 3/1/01 - THE CREW GOT A ENG NR 2 EPR MODE FAULT, N1 MODE XX AND RETURNED TO PHX. IN PHX DURING TROUBLESHOOTING OF NR 2 FADEC, HAD P2T2 SENSE/RELAY BOX/HC2 MESSAGE. INSPECTED THE FADEC WIRE HARNESS AND CONNECTOR FOR SECURITY AND NO DISCREPANCIES FOUND. REPLACED THE RELAY BOX IAW AMM 71-51-49-000-010 AND 71-51-49-400-010 AND OPERATIONALLY TESTED GOOD IAW AMM 71-51-49-710-050. NO FAULTS WERE RECORDED ON FADEC2A AND FADEC2B; ENGINE RUNS WERE GOOD AND ALL INDICATIONS NORMAL.