As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, NOSE GEAR DID NOT COME UP, PERFORMED QRH AND RETURNED TO FIELD. (FLT#3139). LEFT NOSE GEAR WOW SENSOR PX03 DEGRADED OUT OF RANGE. PERFORMED ADJUSTMENT OF SENSOR PX03 IAW AMM. OPERATION CHECK OF NOSE GEAR IAW AMM. OPS CHECKS GOOD. RESTORED AIRCRAFT TO NORMAL.