It says in the (English) piece quoted by the OP that the $360 was demanded by the Boeing employee to carry out the work, so not the cost of the pump itself?
I don’t carry $360 in my wallet, (I wish !), and most cabin crew I have worked with don’t seem to carry much cash at all, so am not sure why the crew would be considered any more able to pay than the passengers?
In my last airline, a crew made an unscheduled diversion for a medical emergency, and were required to pay cash for the fuel at a Middle Eastern airport that we had no arrangements with. That was a lot more than $360 !!