What was found
CREW REPORTED AVIONICS MASTER SWITCH INOPERATIVE ON PREFLIGHT. MAINTENANCE REMOVED AND REPLACED SWITCH AND RETURNED AIRCRAFT TO SERVICE. (PTRS-2001B5540)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CREW REPORTED AVIONICS MASTER SWITCH INOPERATIVE ON PREFLIGHT. MAINTENANCE REMOVED AND REPLACED SWITCH AND RETURNED AIRCRAFT TO SERVICE. (PTRS-2001B5540)