What was found
THE AIRCRAFT WAS GROUNDED. DURING APPROACH FLAPS WERE EXTENDED TO 5 DEGREES. PLANE WAS NOT SLOWING AND WE REALIZED FLAPS HAD NOT EXTENDED. GAUGE WAS STILL AT ZERO AND NO LIGHTS OVERHEAD. RETRACTED FLAPS AND TRIED TO EXTEND TO 1 DEGREE A SECOND TIME. WE PROCEEDED WITH TRAILING EDGE FLAP DISAGREE CHECKLIST. EXTENDED FLAPS W/ ALT FLAP SWITCH AND LANDED NORMALLY. TROUBLESHOOTING FAULT PER FIM TASKS 27-51-00-810-801 FSEU BITE AND 27-51-00-810-336- TRAILING EDGE FLAP PRI CONTINUED OPERATIONS/LOCKOUT PROB. NO CURRENT FAULTS, NO LATCHED OR HARD FAULTS IN HISTORY. REPLACED FSEU PRECAUTIONARY, CYCLED FLAPS NUMEROUS TIMES. ALL TESTS AND CHECKS ARE NORMAL PER MM 27-51-01-401. OK FOR SERVICE.