What was found
DURING APPROACH FOR LANDING AT WSAP FLAPS STOPPED AT 60% DURING EXTENSION. CONTINUED APPROACH AND LANDED WITHOUT INCIDENT.DURING SCHEDULED B1 CHECK ACCOMPLISHED VISUAL INSPECTION OF ALL FLAP TORQUE SHAFT CONNECTIONS AND ASYMETRIC BRAKE ASSY. NO DEFECTS NOTED. ACCOMPLISHED HSP2709 - DETAILED INSPECTION WING FLAP JACKSCREW BALL-NUT WEAR. PERFORMED FLAP CARRIAGE ROLLER CLEARNACE CHECK. NO DEFECTS NOTED. NO. 2 FLAP JACKSCREW REPLACED PRECAUTIONARY DUE SUSPECTED BALL NUT BEARING WEAR PER SMP 581 27-50 PGS. 226 & 232. DRC 0012 AND 0034. POST CHECK TEST FLIGHT OPS CHECK NORMAL.