The UK Air Accidents Investigation Branch has published a report into an investigation into a series of pitot system blockage events on different aircraft which occurred between 9 June 2021 and 19 July 2021 at Heathrow Airport. Between 9 June 2021 and 19 July 2021, several aircraft suffered from abnormal pitot/static system events, two of which resulted in rejected takeoffs. The AAIB investigation identified the cause to be the nesting activity of certain species of wasps and bees within pitot probes. The report addresses the likely reasons as to why there was a concentration of such events over a relatively
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