As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX FLIGHT NR 2334: DURING TAXI, NOTICED POSITION LIGHT NOT ON. TURNED ON SWITCH AND C/B POPPED. AIRCRAFT RETURNED TO BLOCKS. MAINTENANCE REPLACED BULB AND PERFORMED OPS TEST IAW Q400 AMM TASK 33-42-00-710-801. NO DEFECTS NOTED. OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.