As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF WHEN WE RETRACTED THE LANDING GEAR, THE NOSEWHEEL GEAR DID NOT COME UP. LOWERED FOR LANDING AND GEAR WORKED FINE. RAN QRH PROCEDURE. GROUNDED - YES. AIR TURNBACK. DIVERSION TIME 39 MINUTES - ACCOMPLISHED B737-800 FIM 32-30 TASK 810, NO FAULTS FOUND. ACCOMPLISHED OPERATIONAL TEST FOR THE NLG REF B737-800 AMM 32-33-00-710-801. OPS TEST GOOD.