Those are escape losses you will get during storing.
Calculating on the aircraft itself only is meaningless since you need to get the
hydrogen from production to the airport, store it there, then load it.
"Delivery of both compressed and liquefied hydrogen would be troublesome. If by road, it would require 13% more tankers so about 1 in 7 lorry accidents would,on average, involve a tanker. If using pipelines, it would take 1.5 times more energy to transfer hydrogen 3,000 km then is contained in the gas itself."
M