MP John Hayes was driving through Weston Hills on his way home to Moulton on the school run with his elder son William when he saw a military helicopter circling in the sky and police.
He was told about the F-15 crash in a telephone call from community police inspector Jim Tyner.
The MP later went to Weston Village Hall, where he met some of the children from Honeypot Day Nursery and their families, and put out a radio plea to deter sightseers from getting in the way of the emergency services.
Mr Hayes praised nursery staff for acting speedily in getting the children to a place of safety.
In the aftermath of the crash, Mr Hayes said the main issue was the smoke coming from the burning aircraft.
The MP said: “We need to find out what happened.
“Safety has to be the prime priority.
“I know that there will be an investigation, I don’t want to anticipate (the outcome of) that.
“It is absolutely right that this area is an area associated with aircraft but it’s also right that everything that’s done is done safely and properly. I have no doubt that that’s what the authorities, including the United States Air Force and our own Royal Air Force would say too.”
The South Holland and the Deepings MP says: “I live in the village just up the road. It could have been my village, couldn’t it?”