What was found
AFTER TAKEOFF AT ABOUT 2000 FEET, EICAS MESSAGES IAS DISAGREE AND ALT DISAGREE APPEARED. F/O AIRSPEED INDICATOR WAS 400 FEET LOWER. CAPTAINS AIRSPEED INDICATOR MATCHED THE STANDBY. WHILE RUNNING THE AIRSPEED UNRELIABLE CHECKLIST, THE AUTOTHROTTLE DISCONNECT EICAS MESSAGE APPEARED. WHILE RUNNING THE A/T DISCONNECT CHECKLIST, BOTH ENG EEC EICAS MESSAGES APPEARED. RUNNING THE ENG EEC CHECKLIST CLEARED THE EEC ISSUE AND TURING OFF THE ENGINE ANTI-ICE CLEARED THE TWO DISAGREE MESSAGES. TURNING ON THE AUTOTHROTTLE BROUGHT THE AIRCRAFT TO NORMAL OPERATION. SUSPECT THE EXCESSIVE USE OF TYPE 1 DEICE FLUID WAS A FACTOR IN THE MESSAGES. INSPECTED PITOTS AND STATICS DRAIN VALVES FOR PRESENCE OF DE-ICING FLUID OR HUMIDITY BUT NO HELP, ALL DRY. DURING INSPECTION OF STATICS PORTS, FOUND KIND OF BLACK FLYING BUGS IN RH CAPTAIN STATIC, LH AND RH ALTERNATE STATIC PORTS. REMOVED BUGS AS I CAN FROM OUTSIDE BUT NEED TO FLUSH LINES. ALL PITOT STATIC HAS BEEN DRAINED AND FLUSHED AS PER AMM 34-11-00-3. ALSO PERFORMED LOW RANGE PITOT-STATIC SYSTEM TEST PER AMM 34-11-00-5 STEP 2, NO DEFECT FOUND. PERFORMED AIR DATA COMPUTING TESTS AS PER AMM 34-12-00-5, NO FAULT FOUND.A/C OK FOR SERVICE.