As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING PRODUCTION TEST FLIGHT STALL RECOVERY TEST 30 DEG FLAP, GEARDOWN, THE AIRCRAFT EXPERIENCED ABNORMALLY HEAVY PITCH CONTROL FORCES. THE ABNORMALITY WAS CLEARED BY HIGH PILOT EFFORT AT THE CONTROL COLUMN. ALL PRODUCTION FLIGHT TESTING WAS STOPPED AT THAT POINT AND THE AIRCRAFT RTURNED SAFELY TO BASE WITHOUT FURTHER INCIDENT.