What was found
INSPECTION TYPE:N/A F/O'S AIRSPEED DIFFERS BY 20 KNOTS IN FLIGHT ALTERNATE ADC SELECTED CURES INDICATION PROBLEMS. RT ADC SEEMS INACCURATE, ASSOCIATED MACH SPEED TRIM AND RUDDER RATIO EICAS MSGS DISPLAYED. T/S SYSTEM AND REPLACED RIGHT ADC PER FIM 34-12-00 AND MM 34-12-01-4 ACCOMPLISHED MCD TEST 30 CURRENT FAULT REPORT. NO FAULTS REPORTED ALL M MSG CLEARED PER MM 22-00-02/201.