What was found
MCP FAULT. FOUND AUTOPILOT ANNUNCIATOR LIGHT L19 FAULTING. TRIED GOOD UNIT FCC L & R PASSED TEST 1. C FCC FAULTING NO INFC FCC C MCP A-P EN G DISC AND NO INFC FCC C MCP A-P ARM IN. PER FIM 28 V DC PRESENT AT PINS 7 ALL CONNECTORS. ACCOMPLISHED WIRING CHECKS PER WDM. FOUND BROKEN WIRE AT MCP CONNECTOR D479 PIN 30 WIRE W011-770-22. REPLACED THE CONTACT PIN AND ACCOMPLISHED CAT III GROUND CHECK PER MM, SYS CHECKED OK. REPLACED MODE CONTROL PANEL & C FCC COMPUTER REF MM.