As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ALPHA VANE LIGHT ILLUMINATED AND REMAINED ON DURING CRUISE. CIRCUIT BREAKER TRIPPED. ACFT GROUNDED. FOUND CB OPEN ON P18-3, C-3 HEATERS ALPHA VANE LT. RESET CB REF MM 20-60-01. TESTED LT ALPHA VANE HEATER REF FIM 30-31, TASK 804. TESTS OK. NO HISTORY 60 DAYS. GROUND VERIFICATION TEST SUCCESSFUL.