As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WHILE CLIMBING THRU FL200, A LOUD CTC HOWL WAS HEARD WITH A STRONG SMELL OF SOMETHING BURNING. OBSERVED NR 1 CTC SURGING. SHUT OFF NR 1 CTC AND BURNING ODOR DISAPPEARED IN APPROXIMATELY 5 MINUTES. NO ADDITIONAL PROBLEMS NOTED. FOUND NR 1 CTC COMPRESSION FAN SEIZED, NO ROTATION. REPLACED NR 1 CTC IAW DC-8 MM CH 21-50. OPS CHECKED GOOD.