As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, RECEIVED GEAR DISAGREE AND NOSE DOOR OPEN WARNING MESSAGES. NOSE GEAR INDICATED DOWN WHILE MAINS WERE UP. NOSE INDICATED DOWN AND GREEN THE ENTIRE TIME. RETURNED TO DEPARTURE. ALL GEAR LOCKED DOWN NORMALLY. FOUND OLEO EXTEND, F23 OUT OF RIG. RIGGED PS23 NOSE GEAR. OPS CHECKED NORMAL IAW AMM 32-61-05 AND AWAC SUP 10-087.