Why was there a KLM at Boston Logan (KBOS)?

Question

I was driving by Logan Airport today to drop a friend off at the airport and I noticed that KLM was at the airport! I saw the plane with my own two eyes. It was either a B772 or an A332. I believe it was a B772ER. But usually Northwest (A333) flies the BOS-AMS route, so what happened today?

Answer 1

Klm and Northwest have a partnership, the plane is on loan to Northwest due to a technical problem on the original plane! :D

Answer 2

my guess it could have been a diverted flight say from New York

due to weather

or it could have been a charter as well

Answer 3

there are two reason why it was there. 1. its was their as a swap for an aircraft for NWA due to anything, or NW let KLM fly that route that day. 2. Something was going wrong at JFK and the didnt have enough fuel to circle around so they landed at BOS to get more fuel and wait for the problem to go away.