As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1317 - AFTER TAKEOFF DFW NOSE GEAR WOULD NOT RETRACT. HAD NUMEROUS SPOILER AND FLAP WARNINGS IN FLIGHT. OUTFLOW VALVE CYCLED OPEN AND CLOSED SEVRAL TIMES. RECYCLED GEAR AND CIRCUIT BREAKER PER OPERATIONS MANUAL. RETURNED DFW AND LANDED WITHOUT INCIDENT. REPLACED LOWER PISTON PER MM. RETURNED NOSE GEAR SEVERAL TIMES. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)