Electrical connections for engine control and monitoring . Air Systems . Bleed air is extracted from the sixteenth stage of the compressor and used for starting LM2500s and gas turbine generators, the anti-icing system, and the prairie and masker air systems which help suppress engineering and propeller noise transmitted to the sea. . Start air is supplied to the starter on the accessory gear box, where it turns an air turbine. An air inlet plenum for each engine is situated between the O1 and O2 levels.
Moisture separators are a knit wire mesh that collect and drain water from the incoming air.
Warm bleed air from the LM2500 compressor is admitted into the air stream to keep the intake surfaces from freezing. . The FOD protection offered by the separators is lost when the inlet doors are open. . The module inlet plenum attaches the compressor bell-mouth to the air duct via a flexible coupling. The exhaust uptake vents the exhaust gases from the power turbine exhaust up through the ship to the atmosphere. An eductor effect is created by the exhaust gases going up the exhaust trunk that draws a vacuum on the module interior to draw cooling air from the enclosure. .