B737-800
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 190; Flight Crew Type 4677
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Flight Crew Returned To Departure Airport
Human Factors; Aircraft; Procedure
During climb out Flight Attendant reported a loud 'rushing air' noise coming from Main Cabin Door 1L. Cockpit indications were all normal. After inspection by cockpit crew it appeared that the main cabin door was improperly closed on the ground. Right side interior main cabin door hinge cover was out of place not allowing the cabin door to properly seal. Coordinated with Dispatch to return to ZZZ so Maintenance Technicians could inspect door. After returning to ZZZ; Maintenance found door to have been improperly closed. Corrective action: close door properly; no further action required. After discussion with Dispatch and Maintenance Technicians; aircraft was refueled; re-released; new [Maintenance document] signed-off; and proceeded to ZZZ1 without further incident.
B737 Captain reported Flight Attendant reported air leak at cabin Main Entry Door after takeoff.