As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF WHEN RETRACTING THE LANDING GEAR THE NOSE GEAR DID NOT RETRACT. RECEIVED A GEAR DISAGREE WARNING MESSAGE AND NOSE DOOR OPEN WARNING MESSAGE. FOLLOWED QRH AND LANDED. R & R THE BENT NLG OLEO CENTERED/EXTENDED PROXIMITY SENSOR, PSI4GA, BRACKET IAW AMM. PERFORMED SEVERAL EXTENSIONS & RETRACTIONS IAW AMM.