What was found
AFTER TAKEOFF, PILOT NOTICED THE LT GEN ANNUNCIATOR ILLUMINATED, PILOT TRIED TO RESET GEN TWO TIMES WITH NO EFFECT. DECIDED TO RETURN AFTER VECTORING BACK PILOT NOTICED A BURNING SMELL. TURNED OFF THE LT GEN SWITCH & LANDED WITHOUT FURTHER INCIDENT. TROUBLESHOOTING REVEAL DEFECTIVE DIODE PN 1N0007 ON LT OVER VOLTAGE RELAY & LT GEN CONTROL FUSE PN AGC15. REPLACED DEFECTIVE PARTS & PERFORMED LT GEN OPERATIONAL CHECK. ALL CHECKS WERE NORMAL.