Investigators found that an update to the airline’s reservation system, which had happened while flights were grounded during the first coronavirus lockdown, saw 38 passengers being allocated a child’s “standard weight” of 35kg instead of the adult estimate of 69kg.
As a result, the load sheet produced for the captain to determine inputs for take-off stated the aircraft was 1,200kg lighter than it actually was.
This led to the pilot taking off with “less thrust”.
The AAIB added: “Safe operation of the aircraft was not compromised.”
A similar problem impacted two other flights later on the same day.
Both are reported to have taken off with the wrong information on load sheets.
Despite this, no major issues were reported as a result of the inaccurate information.
Express.co.uk has followed up with the airline for additional comment.
At the time of writing, TUI is not operating flights or holidays due to ongoing travel restrictions as a result of the COVID-19 pandemic.
However, the holiday provider has detailed plans to return to flying as soon as May 17 in accordance with Government guidelines.
- ^ TUI (www.express.co.uk)
- ^ Cabin crew secrets: Why you should never lean against plane windows (www.express.co.uk)