What was found
ON FINAL APPROACH, ON SELECTING FLAPS TO 20, FLAPS STOPPED AT APPROXIMATELY 17. RECEIVED T/E FLAP DISAGREE ALERT. RAN QRH, LANDED WITH FLAPS 20. LANDING UNEVENTFUL. FLAP SYS RETURNED TO NORMAL. FLAPS CYCLED NUMEROUS TIMES. NO FAULTS COULD BE DUPLICATED. NR 1, 2, & 3 FSEU SHOWED NO CURRENT FAULTS IAW MM 27-51-00-5. NO EICAS MESSAGES EVER SHOWN TO CREW OR MC. NO HISTORY OF FLAPS IN THE LAST 90 DAYS. NO FURTHER ACTION REQUIRED AT THIS TIME.