As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GROUNDED - N1 SPLIT GREATER THAN .5 (LEFT 93.3 / RIGHT 94.0). RETURNED TO GATE. ACCOMPLISHED FIM 77-05-00-810-806-F00, NO FAULTS ON EEC, DEU BITE CHECK. CLEANED AND RESECURED ENGINE 1 AND ENGINE 2 CONNECTIONS ON N1 SPEED SENSORS PER AMM 70-70-01. ACCOMPLISHED ENGINE 1 AND ENGINE 2 START PROCEDURE PER AMM 71-00-00, ALL PERAMETERS NORMAL, OKAY FOR SERVICE.