As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NW STEERING FAULT DISPLAYED ON UPPER ECAM SCREEN WHILE ENROUTE. NEEDED TOW TO GATE. ON SUBSEQUENT FLIGHT HAD LOW LEVEL GREEN HYD INDICATION. TOW TO GATE ALSO NEEDED. [06-22-07] FAULT TRACING FOUND A WANDERING SIGNAL VOLTAGE FROM 4GC NOSE WHEEL STEERING FEEDBACK SENSOR. REPLACED FAULTY FEEDBACK SENSOR AND REPLACED 6GC NOSE WHEEL STEERING SERVO AS A PRECAUTION.