[CookiesOnMyDesk]

Boeing doesn’t make engines.

[IMTDb]

Supplier selection is an integral part of the manufacturing process. When you make and sell a plane, everything inside becomes your responsibility.

When my web app crashes, I don't get to say "No worries guys, the DB had an issue and we are not a DB provider so we can't be held responsible.

[throwaheyy]

Pratt & Whitney engines have not historically been less reliable than GE or Rolls-Royce engines. If they were, no airline would use them.

And we don’t yet know whether that is the case now. With only a few engine manufacturers this could easily be a coincidence.

Engines are not Boeing’s responsibility. They are not even selected by Boeing, but by the customer airline.

[daneel_w]

But surely it's their sole responsibility to maintain and service the aircraft all the same?

[TylerE]

Not at all.

Service is the airline's/owners respobility.