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Home›Difference Check›TUI 737 weight incident attributable to the “Miss” interpretation of feminine passengers | Information

TUI 737 weight incident attributable to the “Miss” interpretation of feminine passengers | Information

By Fred J.
April 8, 2021
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Investigators traced a takeoff weight error on a TUI Airways Boeing 737-800 to a flaw launched in a reservation system by worldwide variations in the best way ladies are handled.

The reservation system had been improved throughout a interval when TUI Airways operations had been suspended as a result of pandemic.

However the programming improve had been carried out in a rustic the place the title “Ms.” was used for grownup ladies whereas “Miss” was for a feminine baby.

When grownup feminine passengers within the UK checked in for the flight from Birmingham utilizing the time period ‘Miss’ they had been robotically categorised as youngsters and given the usual baby weight of 35kg as an alternative of the lady’s commonplace weight of 69 kg.

The British Air Accident Investigation Department stated 38 feminine passengers had been wrongly recognized as youngsters, which meant that the load sheet generated for the flight to Palma de Mallorca on July 21 of the final yr, was greater than 1.2 t lower than the precise weight of the plane.

Whereas the crew observed that the load sheet takeoff weight of just below 64.9 t was over 1.6 t lower than the flight plan estimate – and confirmed on board 65 youngsters relatively than the anticipated 29 – the captain thought of that the distinction was “believable”, given the journey interruptions ensuing from the pandemic.

The pilots additionally mentioned a distinction between the precise and anticipated non-fuel weight, in addition to utilizing a mix of normal and precise baggage weights on the load sheet, however finally determined they may clarify satisfactorily the discrepancies within the figures.

Take-off efficiency was calculated based mostly on a tailwind of 5 kt, utilizing knowledge from the load sheet, and the plane took off with out incident.

The investigators’ evaluation confirmed that the takeoff speeds ought to have been 1 kt greater. Though the wrong take-off weights had been used, the extent of thrust used was barely better than that required for the circumstances.

“This meant that the operational security of the plane was not compromised,” stated the investigation.

However he says the 737 concerned (G-TAWG) was the primary of three planes to depart the UK on the identical date with inaccurate load sheets brought on by the identical subject.

Investigators additionally discovered that the reservation system programming flaw had emerged 11 days earlier, on July 10, when three grownup ladies had been inadvertently checked in as youngsters on the primary flights because the improve.

Though the error was noticed by floor personnel, the investigation states, “No security or floor operations report has been submitted relating to this incidence.”

The difficulty was initially addressed by manually altering the titles of all grownup feminine passengers on every reserving for upcoming flights, with check-in employees being requested to pay shut consideration to the info within the system.

The programmers who carried out the improve tailored the software program to robotically change the title of feminine passengers, implementing it on July 17, however this was solely in a position to change reservations earlier than check-in. The registrations of passengers booked utilizing the title “Miss” who’ve already been checked in – together with these on-line – wouldn’t be modified.

The programmers had been nonetheless engaged on enhancements on July 20, the day earlier than the incident. The investigation signifies {that a} mixture of open on-line registration, a doable software program disruption, and guide correction crews not working over the weekend of July 18-19, meant that the weights of the misallocated passengers weren’t modified.

TUI Airways subsequently stepped up its measures to stop a recurrence, particularly by introducing a formalized process permitting a customer support supervisor to confirm reservations.



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