does anybody think they will have them retrofitted with winglets?
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Nope.
would help cut down the fuel on those 733s which are fuel guzzlers compared to the A319/B738 that are operated by EZY and FR!
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Don't think the savings made in fuel would offset the costs of the retrofit with the time left on the airframes....remember, Jet2 "owns" it's a/c through mortgages. The costs of this are but a fraction compared to the company leasing shiny new A319s/B738s.
SEN : "Saafend" mate !