Date: 202101
Local time of day: 0601-1200
Location: ZZZ1.TRACON, US
Flight conditions: VMC
Light: Daylight
Aircraft: Honda Jet
Operator: Corporate
Operating under: Part 91
Flight plan: IFR
Mission: Passenger
Flight phase: Climb
Airspace: Class B ZZZ1
ATC / advisory: Center ZZZ1
Aircraft component: Horizontal Stabilizer Trim Motor
Component problem: Malfunctioning
Reporter organization: Corporate
Reporter function: Captain; Single Pilot
Reporter qualification: Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Anomaly: Aircraft Equipment Problem Less Severe; Inflight Event / Encounter Loss Of Aircraft Control
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Landed in Emergency Condition; Flight Crew Regained Aircraft Control
Contributing factors: Aircraft; Software and Automation
Primary problem: Aircraft

Narrative: The last time I flew this aircraft before today was [Date] a flight from ZZZ to ZZZ1. The airplane was flawless.Memory items leaving the runway; pitch trim 2.1 [units]; speed brake retracted; flaps up all accomplished.The airplane remained in the hangar except for a Jeppesen update and insertion of new 32GIG SD cards pursuant to Honda Service Bulletin 420-42-015.The insertion of the SD cards are nowhere near the trim hat on either yoke and the standby trim was never activated.Today was my first flight since that date and when I pre-flighted the cockpit I noticed that instead of 2.1 the pitch trim was full nose up about 13 units at the bottom of its travel.I re-trimmed to 2.1 and to the best of my recollection the roll and yaw trim were where they should have been.There was no reason that I knew for any of the trims to have been moved and the aircraft was locked at all times.Takeoff was normal but as I climbed out and engaged the autopilot the airplane suddenly rolled right and the AP (Autopilot) disconnected.I counteracted the roll and trimmed left wing down.I was able to regain control but when queried by ATC (Air Traffic Control) I agreed to [request priority handling] and asked for an immediate return to the airport.ATC gave vectors to final and the landing was uneventful.I contacted Honda and was told that this had been reported twice before but they had ascribed it to a child in the right seat. I fly single pilot and I have no children in the right seat or anyone else usually.I explained the circumstances and Honda agreed to contact a Honda maintenance provider to have them check the trim system. I will also follow up with Honda engineering because there is not a chance in the world that I inadvertently put full nose up trim in my airplane or full right wing down roll trim. In fact the Honda Jet uses very little trim at all in all configurations. There is no pre-flight procedure or other that I am aware of where a pilot would roll trim full nose up or full right wing down.I have learned that if one trim is out of whack; make certain all the others haven't been reset out of limits by any problem in the airplane before takeoff. I also learned that electronic airplanes have glitches even the factory doesn't understand. That isn't comforting.




Synopsis: Pilot flying Honda Jet reported trim problems during climb out.