Date: 202012
Location: ZZZ.Airport, US
Light: Daylight
Aircraft: Commercial Fixed Wing
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Parked
Reporter organization: Air Carrier
Reporter function: Flight Attendant (On Duty)
Reporter qualification: Flight Attendant Current
Human factors: Situational Awareness; Communication Breakdown; Confusion; Physiological - Other
Anomaly: Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Attendant
When detected: Aircraft In Service At Gate
Result: General None Reported / Taken
Contributing factors: Environment - Non Weather Related; Human Factors
Primary problem: Human Factors

Narrative: Minimum Crew Requirements were not followed during a crew change while through the Passengers were onboard.  We had two through Passengers onboard that were continuing on to ZZZ1.  I had a great conversation with them while I was tidying the aircraft.  Our D Flight Attendant was the first Inbound Crew Member to leave the plane.  There was a female Outbound Crew Member that came on to help clean; as well as a COVID-19 Cleaner from the Ramp. A second Outbound Crew Member came onboard as well; he stood in the forward entry area.  I heard the Inbound A Flight Attendant ask him if all of the Outbound Crew Members were at the gate; I guess he said yes because she collected her things walked off the plane.  The COVID-19 Cleaner and the Outbound Crew Member that helped us clean walked off the plane as well.  I also noticed that there was an Above the Wing Supervisor standing in the jet-bridge.  I think he was there because we arrived late and it was an aircraft booked FULL out of ZZZ to ZZZ1.  The two through passengers had moved from the back of the aircraft to the front of the aircraft and sat in row two.  They were seated below the overhead bin where my crew luggage was stowed; and they were asking me if they could use the lavatory.  I brought my things down and thanked the male Outbound Crew Member for stepping onto the plane.  I think that all of my other Crew Members had already walked off the plane; and that I was the last Inbound Crew Member to step off the plane.  This is the part were the COVID-19 Brain Fog comes in.  I'm not sure if the B Flight Attendant or myself was the last Inbound Crew Member to leave the plane.  I do know that there was only one Outbound Crew Member onboard an aircraft with through passengers onboard.  There was a lot going on during the crew change and I didn't think about having two Outbound Crew Members onboard before leaving the aircraft.  Three months ago I had an on the job COVID-19 infection; and I was off work for three months recovering.  I still have a couple of the COVID-19 'Long-haul' symptoms such as Brain Fog and some occasional fatigue.  I should have made sure that two Outbound Crew Members were onboard before I stepped off the plane.




Synopsis: Air Carrier Flight Attendant reported a possible FAR violation due to an insufficient number of FAs on board while passengers were aboard. The Flight Attendant cited long lasting symptoms from COVID-19 that may have contributed to the event.