What was found
(CAN) DURING INITIAL DESCENT, ALL COCKPIT DISPLAYS & INSTRUMENTS STARTED FLUCTUATING RAPIDLY. BUS 1 FAILED INTERMITTENTLY. BOTH ENGINES STARTED FLUCTUATING, POWER CHANGES WERE FELT BY THE CREW. EMERGENCY DECLARED, VISUAL LANDING CARRIED OUT, BOTH ENGINES RUN CARRIED OUT & COULD NOT DUPLICATE SNAG. RESISTANCE CHECKED ON ALL CONTACTS OF SWITCHES 5KG, 6KD, 23PU, 24PU & 9PD. NO FAULT FOUND, FOUND WIRE 2432-205 INSERTED AT CONTACT "E" OF 24PU. IAW AWM TRANSFERRED WIRE 2432-205 TO CONTACT "J" PRIMARY & SECONDARY CONTACTS OF CONTACTORS 1KG, 4PD, 3PA,1PA & 58PA CHECKED SERVICEABLE. FOUND STARTER/GEN NR 1 RATCHET CONNECTOR 1 PVA LOOSE, HOLDING BY CONTACTS. SUSPECT LOOSE 1 PVA CAUSING UNDERSPEED PROTECTION BY NR 1 GCU. FAULT NR 1 GEN SWITCH 5KG, IAW UNDERSPEED PROTECTION DOES NOT REQUIRE ANY RESET ACTION, REASON WHY IT WAS COMING BACK WITHOUT GEN NR 1 SWITCH RESET. IAW MOC REQUEST, STARTER/GENERATOR NR 1 R & R IAW JIC 24-32-61, RAI 10000. RELAY 4 PD R & R IAW JIC 24-00-00, RAI 10010. BOTH DC GENERATOR CONTROL UNIT, OPS TEST CARRIED OUT IAW JIC 24-32-81, OPT 10000. DC BPCU OPS TEST CARRIED OUT IAW JIC 24-46-83, OPT 10000. RUN-UP CARRIED OUT ON BOTH ENGINES AND LEAK CHECK CARRIED OUT ON NR 1 ENGINE. FOUND SERVICEABLE.