Date: 202005
Local time of day: 1201-1800
Location: ZZZZ.Airport, FO
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: Captain; Pilot Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Human factors: Communication Breakdown
Anomaly: Deviation / Discrepancy - Procedural Weight And Balance; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: General None Reported / Taken
Contributing factors: Procedure; Company Policy; Environment - Non Weather Related; Human Factors
Primary problem: Human Factors

Narrative: We had an extremely light passenger load. During the boarding process; the forward FA asked me if it was okay if a passenger moved from the aft of the aircraft to the front of the aircraft. I told her it was okay with me if she was comfortable with doing so; but that was the last communication that we had. After takeoff; I had a sudden realization that the passenger may have moved and that the passenger data/distribution from the auto-closeout may differ from our actual passenger distribution; therefore affecting the accuracy of our weight and balance and manifest. I had the FO call back to the FAs; who confirmed that the passenger did in fact move. After landing; the FA told me that she did not realize that we needed the updated passenger locations for our manifest/weight and balance numbers. This event was caused by a lack of communication by both parties. By not closing the communication loop; there was information that was not conveyed correctly and therefore caused a breakdown. The lack of further information from the FA led me to the assumption that the passenger was not moved; whereas in her opinion I had given her the OK to do whatever she needed to do and there was no need to report back with any changes. Additionally; we are so used to flights being full and the auto-close out process being so automated; that moving passengers is a relatively new occurrence that none of us were necessarily expecting; but that we should be aware of and expect to occur more in the future.During unprecedented times such as these where passenger loads are extremely light and the need to distance passengers may be necessary; and where the weight and balance process is now very streamlined and automated; it would be a great reminder for all crewmembers to be aware of the necessity to maintain accurate record of passenger location; and update the data in the MCDU to reflect where passengers are actually seated if it differs from the auto close-out data. Explaining to flight attendants the importance of this communication (having an accurate manifest and subsequently weight and balance data) may help all parties understand the importance of making these changes. I personally plan on briefing the crew during particularly empty flights; that they need to report any passenger seating changes to me prior to departure.




Synopsis: Air carrier Captain reported that the aircraft departed with passenger distribution data different from the actual distribution due to one passenger changing seats. The Captain noted the aircraft was very lightly loaded and it was important to ensure an accurate record of passenger location; as this could affecting weight and balance data.