Citation III; VI; VII (C650)
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Critical
Air Traffic Control Issued New Clearance; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification
Aircraft
After takeoff climbing out of ZZZ at 1;500 fee we noticed our airspeed went erratic plus or minus 30 kts. Climbing through 6;000 feet to 10;000 feet; the airspeed went to 0 and the altimeter went erratic 1;000 feet to 2;000 feet up and down. Pilot side FMS displayed a message that the air data computer had failed. The co-pilot side was used for reference of flight we advised ATC and they also verified that are altimeter was displaying erratic altitudes when we were level at 17;000 feet. ATC was very helpful. Landed in ZZZ1 safely.
We departed off Runway XX from ZZZ. On the climbout we started to notice airspeed fluctuation indication's on the pilot flying side. Midway on our climb to 17;000 feet; we also started to get more airspeed related indication problems and warning horns. We had contacted ATC about the time we started to level off at 17;000 feet and made them aware of our current situation. They acknowledged and also noticed our transponder was displaying erratic indications on their screen. At this time we were level at 17;000 feet (with local altimeter setting) and asked ATC what they showed for our altitude and they said we were about 400 feet low. We asked if we could stay at our current altitude until we could further diagnose the problem. ATC said; yes that is no problem.Next we ran the checklist and figured out we had a problem with our Air Data Computer #1. I ended up pulling the ADC#1 circuit breaker to eliminate the audio warning horn distractions and switched the transponder to #2 ADC. Soon after we started our decent in ZZZ1 our destination and less than 30 minutes from ZZZ. The remainder of the flight was on ADC#2; Copilot airspeed and Altimeter information followed by a safe landing and no further issues.ADC#1 needs repairs.
CE650 flight crew reported Air Data Computer issues which resulted in erroneous altitude readouts and airspeed issues.