As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 455 - DEN - THE LANDING GEAR WOULD NOT RETRACT AND THE AIRCRAFT WOULD NOT PRESSURIZE AFTER TAKEOFF FROM DEN. THE AIRCRAFT WAS RETURNED TO DEN WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE SERVICED THE NOSE GEAR STRUT IAW MM 32-21-02. THE GEAR WAS SWUNG SEVERAL TIMES WITH OPERATION CHECKING GOOD. (M)