The fuel vent system keeps the pressure of the fuel tanks near the ambient pressure. Too large a pressure difference can cause damage to the wing structure.

The hot battery bus usually receives power from the main battery or main battery charger.

The system design makes sure that two AC power sources can not supply power to the same transfer bus at the same time.

The windshield outlets are forward of the captain and first officer glareshield.

The mix chamber is a cylindrical duct assembly with an outer shell and inner sleeve.

The passenger cabin exhaust air goes through floor grilles to the recirculation system or overboard.

Outlets along the side walls and the center of the ceiling divide the air for symmetrical supply.

Correct punctuation is important because it shows how the different parts of the text are related and prevents ambiguity.

If the danger is clearly specified, the person who does the task will understand the risk and be more careful.

If possible, always tell your reader what can occur if the safety instruction is not obeyed.

Complex sentence structure and the large number of meanings and synonyms that many English words have can cause confusion.