B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 240; Flight Crew Type 5458
Training / Qualification; Communication Breakdown
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
Flight Crew Became Reoriented
Human Factors
We were slightly delayed due to a minor maintenance write-up (lav sink clogged). As soon as maintenance completed logbook; we closed the door. But; I had forgotten that we did not have a fuel slip yet. In fact; they were still in the process of refueling the aircraft. Cabin crew had already armed the doors so I made the decision to just pass the fuel slip through the cockpit window. However; a ground crew member had contacted a zone controller who in turn contacted the gate agent standing in the loading bridge to re-open door 1L.I called out that it wasn't necessary as our doors were armed. Gate agent insisted; so we disarmed doors and reopened door 1L. Spoke with ramp supervisor on phone who told me door had to be opened during refueling. I went to FOM to check and discovered I was wrong. I thought either door had to be open OR doors armed. But FOM reads door MUST be opened if loading bridge is available. My mistake. I now understand the correct reading of FOM.
[Report narrative contained no additional information.]
Air carrier flight crew reported the doors were closed and armed during the completion of aircraft fueling at the gate.