As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT ACFT MASTER SWITCH WOULD NOT ACTUATE ACFT POWER ON SEVERAL OCCASIONS. IF THE MASTER SWITCH WAS CYCLED ON AND OFF SEVERAL TIMES IT WOULD EVENTUALLY TURN ACFT POWER ON. NEW MASTER SWITCH INSTALLED AND OPERATION WAS NORMAL.