Air Traffic Control Fully Certified; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Air Traffic Control Military 30; Air Traffic Control Non Radar 20; Air Traffic Control Radar 50; Flight Crew Last 90 Days 100; Flight Crew Total 15000; Flight Crew Type 4000
Distraction; Troubleshooting
Aircraft Equipment Problem Critical; Deviation - Altitude Excursion From Assigned Altitude; Inflight Event / Encounter Loss Of Aircraft Control
Flight Crew Overcame Equipment Problem
Aircraft
After departure from ZZZ Airport we experience a possible elevator control problem that made it very difficult to comply with turns; altitude and speed. We were finally able to bring the aircraft into controlled flight but not after it had incurred altitude deviation. Our maintenance is looking into the reasons for elevator trim freezing causing the aircraft to go into uncommanded attitude and making it very difficult to control. This issue has been intermittent in the past and seems to be getting worse and more often an issue. My primary objective when this took place was just to fly the aircraft. The elevator trim sometimes hang up and make the aircraft go nose low and once freed up it goes nose high and it makes it challenge to say the least for both pilots to maintain & keep control. This issue must be fixed as it effect altitude hold and command bars on MFD.
Pilot reported elevator control issues and an altitude deviation.