As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3737 - AFTER TAKEOFF, NOSE GEAR FAILED TO RETRACT TO THE UP AND LOCKED POSITION. FLIGHT RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED GREEN SYSTEM HYDRAULIC PUMP. EXTENSION AND RETRACTION CHECKS WERE SATISFACTORY COMPLETED. A/C RETURNED TO SERVICE. (M)