As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK / DURING ENGING START NR 2 ENGINE STARTED / WHILE STARTING NR 1 ENGINE - NR 2 ENGINE FLAMED OUT. TROUBLESHOT TO A BROKEN WIRE (WDM: 28-21-01 WIRE NR: 388-010-20) ON THE ENGINE FUEL SHUTOFF VALVE AT CANNON PLUG (D790 - PIN: A) REPAIRED REF: (BOEING) SWPM: 20-51-12 & AMM: 28-21-01, OPS CHECK NORMAL. (NOTE: THE VALVE HAD BEEN RECENTLY REPLACED FOR 20,000 - VALVE, FUEL SHUTOFF, P/N: 61185 S/N: A1419 TSO/TSI: 35.9 HOURS)