What was found
(CAN) AS PART OF AN INSPECTION OF THE AIRCRAFT WIRING AND PROTECTON DEVICES, IT WAS FOUND THAT (2) CIRCUIT BRAKER SWITCHES FAILED TO PERFORM THEIR INTENDED FUNCTION. THE BREAKER SWITCHES WERE TESTED AT TWICE THEIR RATED CURRENT FOR A PERIOD OF 3 MINUTES AND THEY WOULD NOT OPEN. THE SWITCHES APPEAR TO BE NON MIL SPEC. THE REMAINING CIRCUIT BREAKERS WORKED AS INTENDED. ALL BREAKER SWITCHES ARE TO BE REPLACED WITH MS 24508-B-X MIL SPEC CIRCUIT BREAKER SWITCHES. NOTE: NORMALLY CIRCUIT BREAKERS AND SWITCHES ARE ON CONDITION AND ARE NOT TESTED UNDER THESE CIRCUMSTANCES AS PART OF NORMAL MAINTENANCE PRACTICES.