As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 EGT OSCILATED FROM 450 DEG TO 800 DEG ON CLIMBOUT AND THEN WENT TO ZERO (BOTH NEEDLE AND DIGITAL) CAME ON DURING LANDING. ON NR 4 ENGINE FOUND EGT PIGTAIL CANNON PLUG LOOSE. TIGHTENED CANNON PLUG. NR 4 EGT OPS CKS GOOD ON GROUND RUN, IAW DC-8 JET RUNUP HANDBOOK. NO DEFECTS NOTED AT THIS TIME.