The aircraft underwent normal overnight maintenance which included opening the cowl doors and checking the oil levels, the report said.

BBC: London

For most, but not all, maintenance of a normal weight and a good diet will prevent development of type 2 diabetes.

CNN: What's the difference between type 1 and type 2 diabetes?

Except for the amount of pollutants emitted during the plant construction and maintenance, the normal operation of these power facilities emits essentially no pollutants into the atmosphere.

FORBES: The Economic Reasons Behind Nuclear Power