I was on a flight on a 747 from Paris to Boston when we heard a loud bang. The captain came over the speaker and said reassuringly, "we've lost the no. 1 engine. There's no worry, though, as the 747 can fly easily on three engines. All it will do is cost us a little airspeed so we might be a few minutes late arriving in Boston."

A while later there was another bang. This time the captain didn't sound as reassuring. "We've lost another engine, but it's okay. We can still fly on two engines. We are past half way so we are continuing onto Boston, but we'll be about 30 minutes late." The guy n…

@JayCarr There's the classic BA/Frankfurt one which everyone probably knows:

The German controllers at Frankfurt Airport were a short-tempered lot. They not only expected you to know your parking location but how to get there without any assistance from them. So it was with some amusement that we (PanAm 747) listened to the following exchange between Frankfurt ground and a British Airways 747 (radio call Speedbird 206) after landing.

Speedbird 206: "Good morning Frankfurt, Speedbird 206 clear of the active."

just found a page full of them (http://www.eaa67.org/Miscellaneous/jokes.htm):

One day the pilot of a Cherokee 180 was told by the tower to hold short of the active runway while a DC-8 landed. The DC-8 landed, rolled out, turned around, and taxied back past the Cherokee.

Some quick-witted comedian in the DC-8 crew got on the radio and said, "What a cute little plane. Did you make it all by yourself?"
The Cherokee pilot, not about to let the insult go by, came back with a real zinger: "I made it out of DC-8 parts. Another landing like yours and I'll have enough parts for another one."