Air Canada Boeing plane bursts into flames seconds after taking off

[Fichefinder]

9. There is tremendous pressure to keep the engines on the wing

Because the maintenance facilities are overwhelmed. Once you take it off wing the amount of paperwork you have to do to put it back on is astronomical. Once it is removed it is usually so beat to shit that they change everything except the data plate.

So they squeeze every possible hour out of it.

Not unusual to have to perform an engine borescope after every 100 or even 50 hours. You take your measurements and an engineer eventually signs a release giving you the cover to fly another 50.
Refuel and repeat.
"Beat to fit and paint to match"