What was found
AT 35,000 FT LOSS OF CA'S AIRSPEED INDICATOR, ALTIMETER, AND VERTICAL SPEED INDICATOR. RED X'S ON ALL SPS ADVANCED ON EICAS. TROUBLESHOT IAW FIM 34-22-00-810-812, AND FIM 34-22-00-810-813. R & R THE NR 1 AIR DATA COMPUTER IAW AMM 34-15-01. OPS CHECKED GOOD. ALSO, SPS ADVANCE MESS RELATED TO ADC FAIL IAW FIM 27-36-00-810-804. OPS CHECKED GOOD