Flight Crew Air Transport Pilot (ATP)
Communication Breakdown; Time Pressure
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Passenger Misconduct
General None Reported / Taken
Environment - Non Weather Related; Human Factors
We were in ZZZ. I don't Remember the gate. It was my leg to fly to ZZZ1. We had some weather approaching from the south. Me and the Captain knew it was going to be a quick taxi being we were going to takeoff XXR. So we did preflight check at the gate and then when the flight attendants were ready they closed the flight deck door and then locked it. When the ramp crew was ready we did the push checklist. We started both engines as me and the Captain talked about because of the short taxi. Then we did the taxi check before we moved the aircraft due to the short taxi. We then taxied towards Runway XXR and during that time we did the before takeoff checklist. I'm pretty sure I called the back and told the flight attendants and cabin we were next for takeoff. After going through the checklist and noticed that the flight attendants did not call us. So I called back there to see if they were ready and from what I heard they were. It was not as clear as normal because of the wearing of the mask for COVID. We then closed the before takeoff checklist before departure and was cleared to takeoff. We then arrived at ZZZ1 with no issues. Then we landed and passengers deplaned; someone getting off the plane said something to me but was not able to hear being she was walking and far away with her mask on. Then the forward Flight Attendant came to the front and spoke to the Captain saying they had a passenger was not listening to the rules with the mask compliance. That's all I heard about. We then continued the rest of the trip. Then yesterday; we went ZZZ2 to ZZZ3 had 2 hrs between the next flight so then I went to go get food before everything closed. As I was going back to the gate the Captain told me we were removed from the rest of the pairing because of the other day that the flight attendants were not seated for departure. That was what I heard for the first time and was a little confused because the flight attendants never said anything to me after that flight from ZZZ to ZZZ1 the day before.
Air carrier First Officer reported taking off with the flight attendants not seated citing a possible misunderstanding because the FA was speaking through a protective mask.