Book 3 - Supervisory Engine Control

Question 1

when FADEC is used, there in no ___________ linkage to the engine; all of the control inputs are electrical

however, the range must still be satisfactory and there must be bounce at the maximum stop on the flight deck to give the pilot confidence that the engine is controlling the maximum fuel flow, not some arbitrary stop on the throttle quadrant

a _______ check must also be carried out to ensure all of the throttles line up (within limits) at various throttle settings

Answer 1

when FADEC is used, there in no MECHANICAL linkage to the engine; all of the control inputs are electrical

however, the range must still be satisfactory and there must be bounce at the maximum stop on the flight deck to give the pilot confidence that the engine is controlling the maximum fuel flow, not some arbitrary stop on the throttle quadrant

a STAGGER check must also be carried out to ensure all of the throttles line up (within limits) at various throttle settings

Question 2

an engine with supervisory control will, as a general rule, have a _________ input to a hydromechanical ____ control governor or unit

Answer 2

an engine with supervisory control will, as a general rule, have a MECHANICAL input to a hydromechanical FUEL control governor or unit

Question 3

electronic control

• consists mainly of a _________ that receives information regarding various engine operating parameters
• adjust a standard hydro-_________ FCU to obtain most effective engine operation
• ranges from basic EGT limiting to FADEC

Answer 3

electronic control

• consists mainly of a COMPUTER that receives information regarding various engine operating parameters
• adjust a standard hydro-MECHANICAL FCU to obtain most effective engine operation
• ranges from basic EGT limiting to FADEC

Question 4

electronic control amplifiers (EEC)

• basic form of engine electronic control (EEC) is to have an _________ fitted that will receive basic information from the exhaust thermocouples and spools
• compares temp and RPM to _______ figures and solenoid operates to reduce fuel flow if exceeded
• main control hydro-mechanical input from ______ ____

Answer 4

electronic control amplifiers

• basic form of engine electronic control (EEC) is to have an AMPLIFIER fitted that will receive basic information from the exhaust thermocouples and spools
• compares temp and RPM to BASIC figures and solenoid operates to reduce fuel flow if exceeded
• main control hydro-mechanical input from FLIGHT DECK

Question 5

engine supervisory control (ESC)

• occurs between ____ and ___ power settings only
• compares N1, EGT, EPR with data received from ADC
• input to system are TLA (_______ _____ _____) and engine _____ state
• ESC compares figures and _____ fuel as required

Answer 5

engine supervisory control

• occurs between IDLE and MAX power settings only
• compares N1, EGT, EPR with data received from ADC
• input to system are TLA (THROTTLE LEVER ANGLE) and engine BLEED state
• ESC compares figures and TRIMS fuel as required

Question 6

full authority fuel control (FAFC)

where the FADEC unit has full control over the whole engine, the FAFC is restricted to control over the ____ flow only

Answer 6

full authority fuel control (FAFC)

where the FADEC unit has full control over the whole engine, the FAFC is restricted to control over the FUEL flow only