The investigation revealed that the pilot used improper procedures.

Call, impatient, wanted to shoot him, but knew that would be improper procedure.

However, there have been serious allegations that improper procedures approving the sale were followed.

Furthermore, the plane's flaps were found to be in the up position, which is improper procedure.

I'm going to have to cite you for improper preflight procedure.

"I do not remember precisely what the concerns were, except that they involved allegations of waste, inefficiency, or improper procedures," she said.

We didn't want to lose this one because of improper procedure.

A third source are chemical fumes from improper procedures and accidents in laboratories or workshops, he said.

Allegations of improper procedure and irregularities in the court records appeared.

The company said it did not believe improper procedures took place.