As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, THE NLG WOULD NOT RETRACT, NOSE DOOR OPENED AND GEAR DISAGREE WARNING MESSAGE. INTERROGATED PSEU, FOUND 523 FAR PS14GA NG OLEO CENTERING/EXTENSION. FOUND GAP ON PSI4 TO BE OUT OF RIG. ADJUSTED THE SENSOR IAW AMM. PERFORMED EXTENSION AND RETRACTION OF NLG IAW AMM AND PSEU BITE IAW AMM. OPS CHECKED GOOD.