As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FIRE DETECT FAIL CWP LIGHT IS ON. AFTER START LEFT FIRE DETECT FAIL LIGHT REMAINED ILLUMINATED. MAINTENANCE TROUBLESHOT PER SF3 MM 26-11-00-1 (FAULT ISOLATION 102). FOUND SHORT TO GROUND AT FIRE LOOP SENSOR 11WG. CLEANED MUCH DEBRIS FROM CENTER PIN ON EACH END OF LOOP. RE-INSTALLED, ALL CHECKS GOOD PER 26-11-00-5. LEFT FIRE DETECT FAIL TEST GOOD. LEFT FIRE TEST GOOD. A/C OK FOR SERVICE.