What was found
FLAP LOCK OUT ON APPROACH. FLAPS 30 SELECTED, LT FLAP 20 & RT 27. FLT CREW STATED THAT THEY SELECTED FLAPS 15 AFTER LOCKOUT OCCURED. THE FLAPS STAYED AT THEIR LOCKED OUT POSITION UNTIL AFTER LANDING, THEY RETRACTED TO 15 DURING TAXI. COMPLIED WITH FSEU BITE IAW FIM 27-51 TASK 801, NO FAULTS NOTED. FLAPS OPS NORMAL IAW AMM 27-51-00. A/C OK FOR SERVICE.