What was found
(CAN) ALTERNATOR LIGHT ILLUMINATED IN FLIGHT. THE ALTERNATOR WAS REPLACED FOR A THIRD TIME DUE TO THIS WARNING LIGHT ILLUMINATION. A SERVICEABLE (USED) ALTERNATOR WAS INSTALLED THIS TIME. THE ALTERNATOR HAS NOW FUNCTIONED NORMALLY FOR THE 4.3 HOURS FLOWN SINCE INSTALLATION. THE REMOVED ALTERNATOR (THE 2ND NEW ONE INSTALLED) LASTED 2.2 HOURS. THE PREVIOUS ALTERNATOR (ALSO A NEW ONE) LASTED 3.8 HOURS AND WAS ALSO REMOVED DUE TO REPEATED ALTERNATOR LIGHT ILLUMINATION. (TC# 20190424026)