As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACV FLIGHT NR 2310: AIRCRAFT RETURNED TO FIELD WHEN GEAR FAILED TO RETRACT. MAINTENANCE FOUND THE NWCENT FAULT IN PSEU PRESENT FAULTS (NEAR GAP TO LARGE). CHECKED NWCENT PROX SENSOR GAP AND FOUND IT OUT OF RANGE. RIGGED NLG WHEEL CENTERING PROX SENSOR IAW Q400 AMM TASK 32-61-06-830-801. NO PRESENT FAULTS NOTED IN PSEU. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.