What was found
DURING TAXI-OUT WHILE ATTEMPTING LEFT TURN, AIRCRAFT DID NOT RESPOND TO TILLER INPUTS. CONTINUED STRAIGHT AHEAD AND SKID WAS NOTED. LEFT ENGINE WAS RUNNING AT TIME OF SKID. SPEED WAS 8-10 KNOTS, POWER WAS 78 PERCENT N2. A/C WEIGHT 292,400. TEST OF NOSE STEERING SYSTEM, FOUND OK. INSPECTED AXLES AND WHEEL BEARINGS, ALL FOUND OK. REPLACED BOTH NOSE WHEEL ASSY'S. LEFT NOSE TIRE WAS FLAT ON RETURN TO GATE. TAXIWAY WHERE SKID OCCURRED WAS JUST REPAVED ONLY HOURS BEFORE INCIDENT HAPPENED. LEFT ENGINE WAS ONLY ENGINE RUNNING WHEN GOING INTO LEFT TURN.