What was found
SHIP 1200 -RVSM- ALT DISAGREE CAUTION CLIMBING THROUGH FL260. AT FL360 CAPTAIN 36250, FO 36000, STBY 36700. CAPTAIN AIRSPEED 280 KIAS, FO 270, STBY 270. CORRECTIVE ACTION: T/S PER B767 FIM TASK 34-12-00-815-804 ADC NO FAULT. DUE TO HISTORY REMOVED AND REPLACED CAPTS ADC PER B767 AMM 34-12 CHKD OK. (6369836)