What was found
AT 36000 FT, SPS ADVANCED CAUTION ON EICAS, CA`S AIRSPEED INDICATOR STARTED SLOWING DOWN AND DIFFERENT FROM F/O BY 30 KTS AND WENT DOWN FROM THERE, ALTITUDE INDICATIOR OFF BY 200 FT, RECEIVED LOWER ALL PROBLEMS RETURNED NORMAL. F/O SMELLED AN ELECTRICAL BURNING ODOR. LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. R & R NR 1 ADC IAW AMM 34-15-01, OPS CHECKED GOOD, LEAK CHECKED GOOD, ACFT RVSM ELIGIBLE.