Can an engine that is extinguished by foam be returned to service?
A foamed healthy engine
(Original)

Inaugural Virgin Atlantic flight to Atlanta cancelled after 'water cannon salute' is swapped for foam and clogs engines
The de-clogging work was carried out as the pilot and flight crew went on a diplomatic mission to explain exactly what had gone wrong.

If it's only foam, the non-faulty engine can be de-clogged, checked, and returned to service.

For QF32, all the engines were replaced. There were issues with the Rolls-Royce Trent 900 engines. The rest of the Qantas fleet either received new engines or modifications.


Video for an engine inspection.
Video for an engine wash.