The flight was supposed to leave from EIN at around 7pm.

It is my understanding that by the time they could fly in another aircraft (due to this event) the runway would be closed.

So, we were driven by bus to Cologne.

Neil

I can see possible reasons for a delay

Things don't always go to plan.. rounded off fasteners on the panel, dropping a tool (loose article), u/s on fit components.

If the low oil level was caused by a leak and a componet was replaced. Wouldn't there be lengthy function tests and independant checks to be carried out?

Straight Blue pump change with spares. 1 1/2 -2hrs plus functions. And before people start that is on the ramp in pouring rain and wind.

Swapping yellow to blue/blue to yellow will take a bit longer. Yellow pump can be dispatched u/s. Blue cannot.

Regards B

The line's a very lonely place to be sometimes.
Nothing quite like seeing a cabin-full of annoyed faces looking down at you when there's a tech delay. :uhoh:

i think it would help if you took a step back to look at this situation. What do wizz air gain by transporting you to CGN? they save the cost of putting a plane load of people in hotels for the night.
what do they lose? they have to pay another crew and fuel to fly an aircraft there to collect your flights pax. they also lose a home based a/c for the next day operation. a 5 figure loss for 1 AOG.
this is an extra ordinary event. it is not planned and certainly not welcomed by you or by the airline.
fixing a defect depends on having spares and qualified manpower at the AOG base. if this is not available, the airline will look for the best possible solution. in this case it was bussing you to CGN.
i agree with wizz in this instance...sorry!