What was found
ETOPS FLIGHT 442 HNL-OAK - ON APPROACH THE CREW SELECTED FLAPS 15 AND THE FLAPS ONLY MOVED TO FLAPS 1. THE CREW USED THE ALTERNATE SYSTEM TO DEPLOY TO FLAPS 15. THE CREW LANDED IN OAK WITHOUT FURTHER INCIDENT. MAINTENANCE BITE CHECKED THE FLAP SLAT ACCESSORY UNIT AND OPERATIONAL CHECKED THE FLAPS WITH NO FAULTS FOUND PER AIRCRAFT FIM 27-51-00-810-836. THE AIRCRAFT WAS RETURNED TO SERVICE AND COMPLETED A FLIGHT VERIFICATION ON THE NEXT FLIGHT LEG.