As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TEMPERATURE SOURCE SELECTOR SWITCH INDICATES ERRATIC TEMP IS WHEN MOVED. ACFT GROUNDED. FOUND AIR TEMP SELECTOR SWITCH EXTREMELY LOOSE IN PANEL. REMOVED CONTROL PANEL LIGHT PLATE, NUT SECURING SWITCH TO PANEL WAS 5 FULL TURNS FROM TIGHT. TIGHTENED THE NUT. RE-SECURED LIGHT PLATE & KNOBS. OPS NORMAL IAW AMM 21-61-32, ALL TEMP SELECTIONS READ STEADY.