What was found
IAS DISAGREE EICAS B THE AIRSPEED DIFFERENCE BETWEEN THE AIR DATA COMPUTERS IS GREATER THAN 5 KNOTS AND THE RADIO ALTITUDE IS GREATER THAN 400 FEET FO AIRSPEED UNRELIABLE DISAGREED WITH CPT AND STANDBY INSTRUMENTS 30+ KNOTS LESS CAPT STBY. PERFORMED F/O PITOT SYSTEM FLUSH PER AMM 34-11-00, NO MORE DEBRIS COLLECTED AT ALL POINTS. REINSTALLED PITOT PROBE PER AMM 34-11-01 AND PRESSURIZED SYSTEM FOR LEAK CHK PER AMM 34-11-00, NO LEAKS NOTED, LEAK RATE TEST PASSED. PRESSURIZED F/O'S AND LEFT AUX 1 PITOT PROBES AND COMPARED F/O'S AIRSPEED TO THE STBY A/S INDICATOR, BOTH MATCHED AT ALL SETTINGS. A/C OK FOR SERVICE.