Block 2 Powerplants

Question 1

What are the hazard areas around the engine

Answer 1

Inlet and exhaust area

Question 2

What should be on any time the engines are turning

Answer 2

Anti collision lights

Question 3

What type of engine is on the P8A

Answer 3

CFM56-7B

High bypass, Dual-rotor, axial flow turbo fan

Question 4

What are the 5 fuel tank groups

Answer 4

M1
M2
Center
Fwd 
Aft 

And two surge tanks

Question 5

What does OBIGGS stand for and what is its purpose

Answer 5

Onboard Inert Gas Generation System

Provides Nitrogen Enriched Air (NEA) to the fuel tanks to prevent explosion under ballistic threats

Question 6

Describe UARRSI

Answer 6

Universal Aircraft Refueling Receptacle Slipway Installation

On the crown of the FWD section of the Aircraft, provides P8A with Aerial refueling capabilities

Question 7

What is the total fuel capacity of the P8A in gallons

Answer 7

10,856

Question 8

What makes the P8A an all weather aircraft

Answer 8

Bleed air for thermal anti icing
Electrical anti icing
Windshield wipers

Question 9

What type of APU is on the P8A and what does it provide

Answer 9

Honeywell 131-9B, Self contained gas turbine engine installed in a fireproof compartment in the tail section.

Provides the Aircraft with bleed air and electrical power

Question 10

What are the 6 sections of the CFM56-7B?

Answer 10

1) Fan and Booster section
2) High Pressure Compressor
3) Combustor
4) High Pressure Turbine
5) Low Pressure Turbine
6) Accessory Drive

Question 11

Describe the purpose of the Fan and Booster section.

Answer 11

The fan and booster section increases the speed of the air to create compression.

Question 12

Describe the purpose of the High Pressure Compressor.

Answer 12

The HPC is a 9 stage compressor that sends compressed air to the combustor as well as supplies bleed air for aircraft pneumatic systems.

Question 13

Describe the purpose of the Combustor section.

Answer 13

The combustor section mixes air from the compressors and fuel from the fuel nozzles to make hot gases.

Question 14

Describe the purpose of the High Pressure Turbine.

Answer 14

The HPT converts the energy from the hot gases provided by the combustor section into mechanical energy to turn the HPC rotor and accessory drive.

Question 15

Describe the purpose of the Low Pressure Turbine.

Answer 15

The LPT converts hot gases from the combustor into mechanical energy to turn the fan and booster rotor.

Question 16

Describe the function of the Engine Fuel and Control System.

Answer 16

The EFCS calculates the quantity of fuel necessary to make commanded thrust by metering the fuel and injecting it into the combustor. The EFCS also sends necessary fuel to the engine air system for efficient and stable operation.

Question 17

Describe the function of the Fuel Distribution System.

Answer 17

Supplies fuel to the engine for combustion and servo system operation via the Fuel Pump Assembly, the IDG oil cooler, and Servo Fuel Heater.

Question 18

What does the Fuel Indication System supply data for?

Answer 18

Fuel flow rate
Fuel used
High pressure fuel shutoff valve (HPSOV) position
Fuel Filter impending bypass warning

Question 19

Describe the function of the ignition system.

Answer 19

Supplies electrical sparks in the combustion chamber, usually operate manually but may operate automatically if the EEC senses a possible flameout condition.