As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB FROM PHX EN ROUTE TO LAX TRAILING EDGE FLAPS SPLIT AND WERE ASYMMETRIC AT 1 AND 2 DURING FLAP RETRACTION FROM FLAP 5 TAKEOFF. TURNED BACK TO PHX AND LANDED WITHOUT FURTHER EVENT. MAINTENANCE FOUND THE LEFT FLAP POSITION INDICATOR CIRCUIT BREAKER POPPED BEHIND FIRST OFFICER SEAT. REPLACED FLAP POSITION INDICATOR IAW BMM 27-58-41-401, OPERATIONAL CHECK WAS GOOD.