As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE ROLL-BACK 1500 FEET AGL. HAD N1, N2 ROTATION. NO FUEL FLOW ON RESTART CK LIST, RETURNED TO OHARE. LANDED UNEVENTFULLY. EXCESSIVELY WORN SPLINES IN THE FUEL PUMP DRIVE CAUSED FUEL PUMP TO FAIL AND STARVE THE ENGINE. REPLACED PUMP.