ENG Panel

Question 1

What must the flight crew be aware of when doing a Manual Start on the ground or an Auto Start in the Air?

Answer 1

The crew must abort the start if something goes wrong

Question 2

What are the primary differences between a manual and a normal automatic start?

Answer 2

• The FADEC provides full monitoring during a manual start and will provide appropriate ECAM cautions and procedures to follow in the event of a start fault
• Automatic start interruption and auto-crank are not available

Question 3

What is the approximate time the engine will dry crank during an Automatic engine start?

Answer 3

• IAE V2500 = Approximately 30 Seconds

* PW1100G = Approximately 2 Minutes

Question 4

With the ENG MODE selector in IGN/START what occurs when the ENG MAN START pushbutton is pressed?

Answer 4

• The start valve opens
• Both pack flow control valves close
• FADEC - ENG MODE selector set to NORM
o CEO - FADEC power supply remains powered for 5 minutes.
o NEO - FADEC power supply is cut off.

Question 5

What is the primary difference between the IAE V2500 and PW1100G engine?

Answer 5

The NEO PW1100G engine includes a Fan Drive Gear System (FDGS) which allows the low pressure turbine to operate at higher rotational speeds for peak efficiency while the engine’s fan can operate at lower speeds for optimum propulsion efficiency and lower noise levels.

Question 6

At what point, if any will the start valve automatically close?

Answer 6

• IAE V2500 - At 43% N2 the start valve automatically closes.
• PW1100G - At 55% N2 the start valve automatically closes

Question 7

When would it be appropriate to do a manual start?

Answer 7

• Degraded bleed performance (hot or high altitude airfield)
• Marginal performance of external air or APU air
• Tailwind greater than 10 knots
• After aborting a start because of:
o Engine stall
o Engine EGT over limit o N1 rotation
o Hung start
o IGN A/B Fault