As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MODE CONTROL PANEL FREEZES AT POWER TRANSFER & RT FLIGHT DIRECTOR DISAPPEARS. REPLACED MODE CONTROL PANEL IAW AMM & TESTED IAW AMM. FOUND ALL WORKING EXCEPT CENTER AUTO PILOT. DEFERRED CENTER AUTO PILOT IAW MEL 2210C. PERFORMED MCDP TEST FOR FCC LT, RT, BOTH FAULTED NO INFC L,R A-P CTN 1. C FCC FAULTED NO IN FC C A-P CTN 1, NO INFC C MCP A-P ENG DISC, & NO INFC C MCP A- P ARM IN. MCP TEST DISC BAR DID NOT REGISTER UPON CONT TEST.