As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3224 - ON CLIMB-OUT FROM MSP, WITH THE GEAR UP, THE OUT OF TRIM FOR TAKEOFF WARNING HORN SOUNDED. WHEN THE PITCH TRIM WAS PUT IN THE GREEN ARC, THE HORN STOPPED. THE AIRCRAFT RETURNED TO MSP. MAINTENANCE REPLACED THE PITCH TRIM WARNING CONTROL BOX, P/N 27-82168-007, AND ADJUSTED THE POTENTIOMETER IAW SA227 MM 27-40-10. (M)