As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ROTATION VHF FEEDBACK/ SQUEAL ON BOTH 1 AND 2 RADIOS. B F/D AND AUTOPILOT DISCONNECTED AND WOULD NOT RE-ESTABLISH. REMOVED TIP FROM HEADSET CORD FOUND IN EXTERNAL POWER PANEL FLIGHT INTERPHONE JACK. OPS TEST OF VHF COMM PER AMM 23-12-00 ALL CHECKS NORMAL WITH NO STATIC OR FEEDBACK. PERFORMED DFCS/FLT DIRECTOR BITE PER AMM 22-11-00. ALL TESTS PASSED WITH NO FAULTS. A/C OKAY FOR SERVICE.