As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2416: ON TAXI OUT, PUSHER SYSTEM FAIL LIGHT ILLUMINATED. PERFORMED EMERGENCY CHECKLIST. TAXIED BACK TO GATE. MAINTENANCE C/W FIM TASKS 24-33-00-810-818, TASK 27-33-00-810-829. AFTER OPS CHECKED GOOD. NO FAULTS FOUND. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.