easyeasyJet will install filters for bleed air
Of all airlines the low-cost airline has decided to work with PALL Aerospace, which also manufactures the HEPA filters for re-circulated air in aircraft, to install such filters which are intended to keep out contaminants and are supposed to clean the bleed-air tapped from the engines, in their fleet of aircraft within about one year. As a result, the potential contamination of cabin air could be further alleviated or even prevented.
This was announced by the airline and the manufacturer at the London conference.
The air in most modern aircraft is first sucked in, then compressed, cooled and warmed again. During the flight it is then mixed to about 50% with the already existing air (re-circulated air). The air which has been reused to 50% can be purified from hazardeous substances by these ‚HEPA’ filters. The weak point so far: the constant new air stream fed from the turbines. A good graphic is printed in the Sunday Times.
EasyJet’s and PALL Aerospace’s goals are ambitious. However, innovations are not possible without high goals and commitment. During the period in question, they not only have to undertake test flights, but also have to submit the many applications seeking approval by the various aviation authorities.
The reason is not really clear why a low-cost airline should be first to go down this route. On the other hand, easyJet is currently facing 2 law suits from flight attendants: one in France (criminal charges) and a recent one in the UK.
Strictly speaking, easyJet is not really the first airline to have filters for the bleed-air from their engines. DHL's cargo planes are all equipped with these features: in the cockpit.