As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT. 4020. AFTER TAKEOFF, NOSE LANDING GEAR DID NOT RETRACT, RECEIVED GEAR DISAGREE MASTER WARNING AND NOSE STEERING INOPERATIVE CAUTION. COMPLIED WITH QRH. STEERING NORMAL BACK TO GATE. BTMS NORMAL. SERVICED THE NOSE LANDING GEAR STRUT, LEAK AND OPS CHECKED GOOD IAW MTCM 000-12-710-002 AND SUPP 09-055.