Citation X (C750)
Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 100; Flight Crew Total 4900; Flight Crew Type 1300
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
Flaps failed at about zero degrees on retraction after takeoff. Could not extend; retract; or reset. Crew returned to ZZZ safely for a zero flap landing at ZZZ without any further interruption to the flight.
Corporate Captain reported that the flaps failed when they were retracted after takeoff so the crew did an air return and zero flap landing.