What was found
ATB DUE TO CAPTAINS PFD BEING UNRELIABLE ALSO RECEIVED MACH TRIM AT RUDDER RATIO EICAS MESSAGE. FUEL 36.1 AFTER ATB. PERFORMED MCDP LAST FLIGHT FAULTS, HAD MULTIPLE FAULTS FOR L ADC AND COMPUTERS TALKING TO THE L ADC. T/S €ŒADC SYST LEFT€? PER FIM 22-02 TREE 829 BLOCKS 1,2,3,4,69. REPLACED L ADC REF AMM 34-12-01, OPS CHECK GOOD. PERFORMED GVI OF CAPT PITOT PROBE, NO FAULTS NOTED.