What was found
ON LANDING PREPARATION FLAPS STOPPED AT 18 DEGREES/15 FLAP. LANDING WAS MADE, NO UNUSUAL CONTROL INPUTS NEEDED. RAN ASEU BITE PROCEDURE PER TASK 27-51-801, NO EXISTING FAULTS. HISTORY SHOWED LAST FLT FAULT RT 28VDC EXC INV CODE27-53-280, PERFORMED TASK 27-51-823. DETERMINED TO BE INTERMITTENT FAULT. RAN FLAPS THRU 3 CYCLES, NO TROUBLE FOUND.