What was found
(CAN) AS PART OF AN INSPECTION OF THE AIRCRAFT WIRING AND PROTECTION DEVICES, IT WAS FOUND THAT 5 CIRCUIT BREAKER SWITCHES FAILED TO PERFORM THEIR INTENDED FUNCTION. THE BREAKER SWITCHES WERE TESTED AT TWICE THE RATED CURRENT FOR A PERIOD OF 5 MINUTES AND THEY WOULD NOT OPEN. THE SWITCHES APPEAR TO BE NON-MIL SPEC. THE REMAINING CIRCUIT BREAKER SWITCHES WORKED AS INTENDED. ALL BREAKER SWITCHES ARE TO BE REPLACED WITH MS24508-B-X MIL SPEC BREAKER SWITCHES. SUBMITTER NOTED THAT CIRCUIT BREAKERS AND SWITCHES ARE ON CONDITION AND ARE NOT TESTED UNDER THESE CIRCUMSTANCES AS PART OF NORMAL MAINTENANCE PRACTICES.