As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DEPARTURE, ABLE TO RAISE THE GEAR HANDLE BUT RECEIVED AN UNSAFE NOSE INDICATION . RAN THE QRH, BUT UNSAFE INDICATION REMAINED. PUT THE GEAR HANDLE DOWN AND LANDED UNEVENTFUL AND TAXIED BACK TO GATE. TROUBLESHOT IAW FIM 32-30-00. FOUND UPPER SCHRADER O-RING CUT AND NO AIR IN STRUT. REPLACED THE O-RING AND SERVICED STRUT IAW AMM 32-21-01. LEAK CHECK GOOD. OK FOR SVC.