What was found
REPEAT WRITE UP. NR 3 GENERATOR BREAKER TRIPPED, ACCOMPLISHED CHECKLIST PROCEDURES. RESET GENERATOR AND IT RE-TRIPPED AFTER 1 MINUTE. REMOVED AND REPLACED NR 3 ENG DRIVEN GENERATOR IAW 727 MM 24-20-001-4. FOUND FIELD EXCITATION WIRE (F) CHAFED THROUGH WIRE INSULATION ON GENERATOR BRACKET. REPAIRED WIRE AND REPOSITIONED TO PREVENT FUTURE CHAFING IAW STANDARD WIRING PRACTICES. REMOVED AND REPLACED NR 3 ENG GENERATOR CONTROL UNIT IAW 727 MM 24-22-000-2. OP'S CHECK FOUND WHEN A LOAD WAS PUT ON GENERATOR THE BUS TIE BREAKER WOULD TRIP. REMOVED AND REPLACED NR 3 BUS TIE BREAKER IAW 727 MM 24-20-041-4. RAN ENG AND OP'S CK'D PER 727 JRH. OPS CHECK GOOD.