As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FI STOP OPEN LIGHT CAME ON AFTER GEAR RETRACT ON CLIMBOUT. AIR RETURN TO MSP. MAINTENANCE CYCLED AC POWER, AMBER FI LIGHT WENT OUT. REMOVED AND REPLACED RELAYS 20GA AND 19GA. PERFORMED FI SYSTEM OPS CHECK, PER AMM 76-10-60. OPS CHECK GOOD.