Down the pub - the thread about nothing and everything

[BBROWN1664]

Not quite that easy.  The engines will need to be stripped, flushed and run up as will the electronics systems, some foams turn into a sticky smelly mess although they may not be corrosive, they could react with some materials.  They may be no permanent damage but it's certainly not going to be a quick jet wash or hose down, many hours of work me thinks, someones for the high jump especially if it was a prank!   

It will depend on the foam but in most cases you are correct. there is a newer foam out there that does just require a rinse down but......

A lot of time will be required to inspect the guts of the airframes to make sure no foam got in before any one can sign it off. the engines on those will just need an inspection as the whole thing including intakes and exhaust are above the foamline