What was found
ON APPROACH FLAP INDICATION WAS 10 WHILE FLAP HANDLE WAS AT 30. WE EXECUTED A GO AROUND AND RAN THE TRAILING EDGE FLAP DISAGREE CHECKLIST. WE EXTENDED THE FLAPS WITH THE ALTERNATE FLAPS SWITCH AND THE EXTENDED TO 15 AT A NORMAL RATE WITH NO ASYMMETRY. LANDED AND TAXIED TO THE GATE UNEVENTFULLY.<[01] PERFORMED FSEU BITE IAW FIM 27-51 TASK 801 AND TE FLAPS LOCKOUT TASK IAW FIM 27-51 TASK 836. NO FAULT LOGGED ON LAST FLIGHT LEG AND NO EXISTING FAULTS. CYCLED FLAPS IN PRIMARY MODE IAW AMM 27-81-00-710-801 AND NO FAULTS NOTED. A/C OKAY FOR SERVICE.