What was found
FO AIRSPEED + 5KTS AND ALTITIDE +200 FEET DIFFERENCE FROM THE CAPTAIN. CREW BELIEVES THE CAPTAIN SIDE IS CORRECT CREW DEBRIEF 1ST OFFICER SELECTED ALT. AIR DATA SOURCE SELECT F/O,CAPT,STBY INDICATED SAME. VISUAL INSPECTED PITOT AND STATIC PORTS NO FAULT NOTE, WHEN FO :1 SELECTED TO ALTERNATE DATA ALL INDICTION WAS SAME, REPLACED RH ADAC REF AMM 34-12-01 PERFORMED OPS TEST AMM 34-12-00-715-001 CK OK, QTY REF AMM 34-12-01, INSPECTED AND CHECKED PITOT STATIC PORT CONNECTIONS FOR INSTALL AND SECURITY,ON RH ADAC COMPUTER COMPUTER,