As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 TRANSPONDER SQUAKS 7777 NO MATTER WHAT THE INPUT (THE VARIOUS CODES) ON THE BOX IS, NR 2 TRANSPONDER INOP (NO SQUAK) FOR VARIOUS CODES. REMOVED AND REPLACED ATC CONTROL PANEL, NR 1 AND NR 2 TRANSPONDER, OP CHECKS GOOD IAW DC-8 M/M CH 34-53.