As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INITIAL CLIMB, PRIMARY TRIM C/B 0A TRIPPED, ALTERNATE TRIM WORKED FINE. ELECTED TO PULL PRIMARY TRIM C/B'S 0B AND 0C. CONTINUED FLIGHT USING AUTOPILOT. WHEN REMOVING CREW BAGS, NOTICED STRONG ELECTRICAL SMELL (BURNT ODOR) IN BELLY'S 1 AND 2. FOUND UPPER PRIMARY LONG TRIM RELAY BURNT. REMOVED AND REPLACED RELAY IAW DC-9 MM 27-40-04 AND WORK PACK WO 2004905.