LONDON • Footballer Emiliano Sala and the pilot flying his plane when it crashed were likely exposed to "potentially fatal" levels of carbon monoxide (CO), air investigators announced yesterday.
"Toxicology tests found that the passenger had a high saturation level of COHb (the combination product of carbon monoxide and haemoglobin)," Britain's Air Accidents Investigation Branch (AAIB) said in a special bulletin.
"It is considered likely that the pilot would also have been exposed to carbon monoxide," it added.
The Argentinian, 28, was flying to Wales from France to join Cardiff, then still in the Premier League, when the Piper PA-46 Malibu came down in the English Channel on Jan 21 during a night-time flight. His body was recovered, but that of pilot David Ibbotson has never been found.
Sala's family said the bulletin "raises many questions".
"The family and the public need to know how the carbon monoxide was able to enter the cabin," Daniel Machover, the lawyer for the family, said in a statement. "The family calls on the AAIB to salvage the wreckage of the plane without further delay."
Toxicology tests on Sala showed a carboxyhaemoglobin (COHb) saturation level of 58 per cent, according to the AAIB, which added that a level of "50 per cent or above in an otherwise healthy individual is generally considered to be potentially fatal".
It said that carbon monoxide poisoning was a particular risk in the type of aircraft.
The family and the public need to know how the carbon monoxide was able to enter the cabin. The family calls on the AAIB to salvage the wreckage of the plane without further delay.
DANIEL MACHOVER, lawyer for Emiliano Sala's family, on their latest concern.
"Piston engine aircraft produce high concentrations of CO that are conveyed away from the aircraft through the exhaust system," said investigators.
"Poor sealing of the cabin, or leaks into the heating and ventilation system from the exhaust can provide pathways for CO to enter the cabin.
"In this type of aircraft, the cockpit is not separated from the cabin and it is considered likely that the pilot would also have been affected to some extent by exposure to CO."
Exposure can lead to damage to the brain and nervous system, with unconsciousness and heart attacks possible with COHb levels of over 50 per cent.
"It is clear from the symptoms that exposure to CO can reduce or inhibit a pilot's ability to fly an aircraft depending on the level of that exposure," added the report.
A Cardiff spokesman said the club were "concerned" at the report's findings, "which once again highlights that the aircraft used for Emiliano Sala was not appropriate".
Attention had previously focused on pilot Ibbotson, with the BBC reporting that he was colour blind, which would have automatically disqualified him from night flights. The AAIB also said the plane carrying Sala was not authorised to make commercial flights.
But the investigators pointed out that Ibbotson had in the past transported people on a cost-share basis, which is authorised by the regulation for small planes.