What was found
INSPECTION TYPE:C, AIR TURNBACK DUE TO FAILURE OF AIRSPEED AND ALTIMETER SYSTEM. AFTER DEBRIEF WITH CREW, FLS COMPLETED AN INSPECTION OF A/C, FOUND CAPT''S AND F/O''S PITOT DRAIN LINES UNCAPPED IN THE E & E BAY. THE FLAP SYS WAS OVERSPED. *S/D* CAPPED PITOT DRAIN LINES, OPS CHECK GOOD. COMPLETED INSPECTION OF OVERSPED FLAPS. REMOVED AND REPLACED BAD COMPONENTS ACCORDINGLY. A/C OK FOR SERVICE.