Beechjet 400
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 103; Flight Crew Total 2400; Flight Crew Type 1100
Situational Awareness
Aircraft Equipment Problem Less Severe
Flight Crew Rejected Takeoff
Aircraft
After checklists complete we (the crew) took the active runway for takeoff. We lined up and I initiated the takeoff. I had power N1 above 80% when we got a trim miss-configuration horn. In the Beech Jet sometimes you have to flick the trim switch to re-adjust the trim to silence the horn. As my Captain did this I throttled back a few percent on N1 so we wouldn't roll as fast. Once my Captain silenced the horn I continued the takeoff and when the power was at 80% the horn came on again. I then rejected the takeoff. Airspeed was close to 65 KIAS at time of abort. We then vacated the runway as instructed by Tower. Once we were permitted to move; again; we took the plane to the ramp and shut down one of the engines; so we could exercise the thrust lever without using power; to fix the trim issue. We found that after running the trim up and down a few times the trim horn finally stopped and was indicating the appropriately. We discussed that there is nothing functionally wrong with the trim because it passed all the checks and elected to try the take off again. The trim worked and didn't malfunction the rest of our two day trip. The trim was indicated in the takeoff position at the time of takeoff as covered in the two checklists completed prior to takeoff. The trim was functional prior to engine start and passed all pre-flight trim checks per the checklist. The trim worked the rest of the trip without issue.
BE400 First Officer describes a rejected takeoff for a trim induced takeoff warning horn. After returning to the ramp and shutting down an engine for troubleshooting the warning is found to activate even though the trim is correctly set. After running the trim up and down several times the warning ceases to activate inappropriately and the flight departs.