What was found
FLIGHT 1700, ENROUTE HNL - ITO DISCREPANCY: AMBER MESSAGE ON ADU DADC DATA INVALID AFTER V1, CONTINUED TAKE OFF. LOST AIRSPEED FO SIDE, NO YAW DAMP, NOT ABLE TO SET ALTITUDE. CREW RETURNED TO HNL. NO EMERGENCY DECLARED. CORRECTIVE ACTION: MAINTENANCE TROUBLESHOT AND CLEARED OBSTRUCTION FROM THE NR 2 PITOT TUBE. ALL OPS AND LEAK CHECKS GOOD.