What was found
AIR TURNBACK. ANNUNCIATOR LIGHTS ILLUMINATED ON FWD INSTRUMENT PANEL & INDICATOR LIGHTS ON FMC STAYED ILLUMINATED. ALL LIGHTS CEASED UPON LANDING. REMOVED AND REPLACED MASTER TEST RELAY-R33 PER MM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURNBACK. ANNUNCIATOR LIGHTS ILLUMINATED ON FWD INSTRUMENT PANEL & INDICATOR LIGHTS ON FMC STAYED ILLUMINATED. ALL LIGHTS CEASED UPON LANDING. REMOVED AND REPLACED MASTER TEST RELAY-R33 PER MM.