What was found
BOTH ON ADC 2 AMBER CAS: RECEIVED BOTH ON ADC2 MESSAGE AFTER TAKEOFF. SELECTED LEFT SIDE TO ADC 1 AND IT REVERTED BACK TO ADC2. MESSAGE REMAINED THROUGH OUT LANDING AND POWER DOWN. CORRECTIVE ACTION: REMOVED AND REPLACED #1 ADC AS REQUIRED. PERFORMED OPS CHECKS AND LEAK CHECK. OPS CHECK LEAK CHECK GOOD. SYSTEM OPERATES AS COMMANDED.AIR DATA COMPUTER S/N 1U6100073, CERTIFIED TO 47,000 FT ON 27/APR/2025. OPERATIONAL CHECKS SATISFACTORY." ALTITUDE ADC IS CERTIFIED TO IS 55,000 FEET NO OTHER EFECTS NOTED AT THIS TIME. WORK PERFROMED IAW CITATION CE-680A M/M 34-10-15