As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE WARNING MESSAGE ON DEPARTURE. DUE TO NOSE GEAR INITIALLY NOT RETRACTING NORMALLY. MESSAGE CLEARED AND NOSE GEAR CAME UP NORMAL IN 30 SECONDS WITHOUT ANY ACTION FROM FLIGHT CREW. WE NEVER RAN ANY QRC OR QRH PROCEDURES. RETURNED TO FIELD. (FLT#5438) FO: 03/04/2019 CLOSED COMPLETED INSPECTIONS OF NLG, SENSORS, HYDRAULIC SYS IAW AMM. FULL NLG STRUT SERVICE IAW AMM. OPS CHECK GOOD.