Check out the video link if you would like to see a video of the maggots that were on board a recent US flight.
I have heard it all. Maggots on a plane. Passengers were also saying that there were small flies on board the plane, and that the maggots were falling on top of them via the overhead bins.
It was said that spoiled meat was the cause, but the creator of the linked video said that there was no smell of contaminated meat, and she was in the area from which the maggots were located in.
The US Airways flight was brought back, passengers unloaded, where it was then pulled out of service and fumigated. Makes my skin crawl thinking about it.