As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2078 - RECEIVED FLAP DRIVE CAUTION LIGHT WHEN SELECTING FLAPS TO 5 DEGREES ON AFTER START PRIOR TO TAXI. MAINTENANCE REPLACED TORQUE SENSOR UNIT IAW DHC-8-200 AMM TASK 27-52-51-000-801 AND 27-52-51-400-801. FUNCTIONAL TEST GOOD. AIRCRAFT RETURNED TO SERVICE.