[aruanan]

How many engines did UPS jet flight 902 have?

The MD-11 has three engines. One on each wing and one on the tail.



A typical aircraft contrail.

An MD-11 contrail. You should look for more MD-11 contrails. Some of them, like the one at the following link, are unbelievably huge fat trails with spiraling or corkscrew effects.

[Red Steel]

That would have been my guess that UPS flies 3 engine jets, but I didn’t go look to see what they fly. As for this subject, I haven’t seen conclusive proof what made the contrail. I’ll go with unknown.