What was found
FLIGHT 486 LIH-SNA - DURING APPROACH, WHEN THE CREW ATTEMPTED TO EXTEND THE FLAPS, THE LEADING EDGE TRANSIT WARNING LIGHT ILLUMINATED AND THE TRAILING EDGE FLAPS LOCKED-OUT BEFORE FLAPS 1 WITH A SPLIT INDICATION ON THE FLAP GAUGE. THE CREW ELECTED TO DIVERT TO ONT DUE TO SNA AIRPORT RESTRICTIONS. THE CREW SELECTED ALTERNATE EXTENSION FOR THE FLAPS BUT THEY REMAINED LOCKED-OUT BEFORE FLAPS 1. THE CREW LANDED IN ONT WITHOUT FURTHER INCIDENT. MAINTENANCE PERFORMED A BITE CHECK OF THE FLAP SLAT ELECTRONICS UNIT PER AIRCRAFT FIM 27-51-00-810-801 AND FOUND INTERMITTENT FAULT 27-52260. THE RIGHT TRAILING EDGE FLAP POSITION TRANSMITTER DISAGREED WITH THE LEFT TRAILING EDGE FLAP POSITION TRANSMITTER. AS A PRECAUTION, THE RIGHT POSITION TRANSMITTER WAS CLEANED AND THE FLAPS WERE EXTENDED AND RETRACTED MULTIPLE TIMES WITH NO FAULTS FOUND. THE AIRCRAFT WAS RETURNED TO SERVICE. THE AIRCRAFT PASSED A FLIGHT VERIFICATION FOR THE OPERATION OF THE FLAPS ON THE NEXT FLIGHT LEG.