As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT NR 3447, AFTER DEPARTURE THE NR 4 ENGINE ITT WENT HIGH, AND OTHER PARAMETERS DROPPED OFF. AIR RETURN TO MEM. MAINTENANCE REPLACED NR 4 ENGINE BLEED BAND IAW ALLIED SIGNAL MM 72-00-34. PN/ON 2-161-182-18, SN/OFF UNREADABLE, SN/ON 032453712278. OPS CHECKS GOOD.