What was found
(CAN) AS PART OF AN INSP OF AIRCRAFT, WIRING AND PROTECTIVE DEVICES, FOUND THAT 3 CCT BREAKER SWITCHES FAILED TO PERFORM INTENDED FUNCTION. BREAKER SWITCHES WERE TESTED FROM 2 TO 5 TIMES- RATED CURRENT (10-25 AMPS) AND WOULD NOT OPEN AT ALL. EACH SWITCH WAS ALLOWED TO RUN AT 2 TIMES- RATING FOR A PERIOD OF 5 MINUTES. SWITCHES APPEAR TO BE NON-MIL SPEC; HOWEVER, THE REMAINING 11 BREAKER SWITCHES (VARIOUS CURRENT RATINGS) PERFORMED INTENDED FUNCTION. ALL BREAKER SWITCHES ARE TO BE REPLACED BY MS24509-B-X MIL SPEC CIRCUIT BREAKER SWITCHES. NOTE: NORMALLY CCT BREAKERS AND SWITCHES ARE ON CONDITION AND ARE NOT TESTED UNDER CIRCUMSTANCES AS PART OF NORMAL MAINT PRACTICES.