Narrative:

Upon taking off from ZZZ; aircraft would not trim nose down and took both crew members to control the pitch of the aircraft. Retarding power still would not stop the aggressive climb based on the trim failure. We received a primary trim fail cas (crew alerting system) message. At this point in time; it was not possible to maintain an assigned altitude and we [advised ATC] and requested a block altitude and requested a return to the airport. Selecting secondary trim worked and we were able to trim the aircraft properly. We elected to do a flaps 15 landing to minimize excessive trim requirements. We landed safely on runway xxr and taxied uneventfully to the FBO.

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Original NASA ASRS Text

Title: CE-680 flight crew encountered Trim Failure after takeoff; advised ATC; returned to departure airport; and landed uneventfully.

Narrative: Upon taking off from ZZZ; aircraft would not trim nose down and took both crew members to control the pitch of the aircraft. Retarding power still would not stop the aggressive climb based on the trim failure. We received a primary trim fail CAS (Crew Alerting System) message. At this point in time; it was not possible to maintain an assigned altitude and we [advised ATC] and requested a block altitude and requested a return to the airport. Selecting secondary trim worked and we were able to trim the aircraft properly. We elected to do a flaps 15 landing to minimize excessive trim requirements. We landed safely on Runway XXR and taxied uneventfully to the FBO.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.