What was found
SUBMITTER REPORTS THIS IS THE 4TH CIRCUIT BREAKER SWITCH THAT FAILED INTERNALLY. BREAKERS HAVE ALL FAILED IN THE SAME MANNER. IF HELD IN THE 'ON' POSITION, THEY WILL WORK, BUT AS SOON AS RELEASED, THEY STOP WORKING AND SHUT THE ALTERNATOR OFF. SUBMITTER STATED ALL 4 FAILURES ARE IN SAME AIRCRAFT AND HAVE TAKEN PLACE IN LAST 6 MONTHS.