Powerplants Flashcards
What needs to be on when engines are running on deck?
Flashing anti-collision light on the top of the aircraft.
What are the hazards and areas around a P-3C engine?
Propeller area (prop arc) and propeller jet blast area (heat and blast-propelled objects.)
What are the hazards and areas around a P-8A engine?
Engine inlet suction area and engine exhaust area.
What type of engines is the P-3C equipped with?
Four T56-A-14 turboprop powerplant assemblies.
How are the engines and propellers controlled on the P-3C?
By manual actuation of the engine power levers.
What does the engine power lever system consist of on a P-3C?
Four independent subsystems, one for each engine. Each has a pair of engine power levers. Corresponding levers coupled by a torque tube, but different engine levers can be moved independently.
What type of engines is the P-8A equipped with?
Two CFM56-7B engines. (Dual-rotor, axial flow turbofan)
What do the rotors consist of in a CFM56-7B engine?
N1 - a low-pressure compressor and a low-pressure turbine.
N2 - a high-pressure compressor and a high-pressure turbine.
How are the thrust levers positioned on a P-8A and what do they each control?
Automatically by the autothrottle system or manually by the flight crew.
Forward thrust levers - from idle to maximum
Reverse thrust levers - from reverse idle to maximum reverse
Describe the propellers on the P-3C.
Variable pitch, constant speed, hydromatic propeller assembly mounted on each
powerplant assembly.
What maintains the constant speed of the engine on a P-3C?
The blade pitch changing mechanism in conjunction with the fuel control assembly.
How are the propeller blades of a P-3C positioned for ground idle and reverse?
Positioned to provide zero or negative thrust.
What does feathering propellers of a P-3C accomplish?
Lays them flat with the airstream, minimizing drag.
Where are the fuel tanks on a P-3C?
From left to right (facing forward), No. 1, No. 2, No. 3, and No. 4 with tank No. 5 as an auxiliary tank in the center.
Which fuel tank normally supplies the fuel to the P-3C’s APU?
No. 2
Describe fuel storage on the P-8A.
Five fuel tank groups: main 1, main 2, center, forward tank group, and aft tank group. And two surge tanks.
Which fuel tank normally supplies the fuel to the P-8A’s APU?
Main 1.
Describe the auxiliary fuselage fuel tank in the P-3C.
Consists of two separate interconnected fuel tanks; the integral wing center section fuel tank and a bladder cell fuel tank in the fuselage.
Where are the pressure fueling adapters on a P-3C?
Adjacent to each other just forward of the flaps in the aft inboard section of the right wing.
How is fueling normally accomplished on a P-3C and what is the alternative if equipment is not available to do so?
Pressure fueling.
Overwing fuel caps. (Gravity fueling)
What is the total fuel capacity of a P-3C?
9200 gallons.
What is the OBIGGS and its function on a P-8A?
Onboard Inert Gas Generating System.
Provides nitrogen-enriched air to the center, wing and auxiliary tanks to protect from ballistic threats. Keeps tanks at or below 9% oxygen levels.
Through what is aerial refueling accomplished on the P-8A?
The Universal Aerial Refueling Receptacle Slipway Installation. (UARRSI)
Installed in the crown of the aircraft.
What is the total fuel capacity of the P-8A?
10,856 gallons.
What do the P-8A fuel feed system, engine fuel feed and integrated drive generator cooling system consist of?
Fuel tanks
Boost pumps
Fuel lines and fittings
Shutoff valves (convey and control fuel flow at proper pressure and flow rates)
What is engine bleed air utilized for on the P-3C?
Bomb bay heating engine anti-ice wing de-ice oil cooler augmentation cross-bleed engine starting.
What makes the P-3C an all-weather capable aircraft?
Engine anti-ice wing de-ice Empennage de-ice (electrical) Propeller de-ice (electrical) Windshield heat (electrical) Windshield wipers
What is engine bleed air utilized for on the P-8A?
Engine cowl lip anti-ice
Wing anti-ice (three inboard leading edge slats)
What makes the P-8A an all-weather capable aircraft?
Engine anti-ice Wing anti-ice Empennage and wingtip de-ice (electrical) Windshield heat (electrical) Windshield wipers
Where is the P-3C’s APU and what does it consist of?
Lower fuselage compartment just aft of nose landing gear wheel well.
Consists of a compressor, gas turbine engine, and an engine-driven electrical generator.
What is the function of the P-3C’s APU?
Pneumatic power for engine starting and aircraft environmental control system.
Electrical power for on the ground and emergency in-flight operations.
Where is the P-8A’s APU and what does it consist of?
In a fireproof compartment in the tail of the aircraft.
Self-contained gas turbine engine.
What is the function of the P-8A’s APU?
Pneumatic power for engine starting or air conditioning.
Electrical power from starter-generator.
