As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SWITCH CONTACTS REMAINED IN OPEN CONDITION CAUSING MASTER CAUTION SYSTEM TO BE IN A RESET STATE AT ALL TIMES; NOT ALLOWING MASTER CAUTION WARNINGS TO BE DISPLAYED. INTERNAL MICROSWITCH FAILURE. REMOVED AND REPLACED SWITCH ASSEMBLY, SYSTEM OPERATIONAL, CHECK SATISFACTORY.(K)