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
  - CEO - FADEC power supply remains powered for 5 minutes.
  - 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:
  - Engine stall
  - Engine EGT over limit o
  - N1 rotation
  - Hung start
  - IGN A/B Fault

Question 8

What are some potential causes for the illumination of the BLOWER FAULT light?

Answer 8

•  Low blower pressure
•  Duct overheat
•  Computer power supply failure
•  Smoke warning activated

Question 9

What are some potential causes for the illumination of the EXTRACT FAULT light?

Answer 9

•  Low extract pressure
•  Computer power supply failure
•  Smoke warning activated

Question 10

What condition in the avionics ventilation system would cause an external horn to sound?

Answer 10

BLOWER FAULT or EXTRACT FAULT illumination on the ground with both engines stopped.

Question 11

Describe the avionics ventilation system.

Answer 11

It is a fully automated system that considers the skin temperature and adjusts inlet and outlet flaps to optimize cooling and airflow

Question 12

During normal operations, the AIR COND INLET VALVE remains always closed

Answer 12

• OPEN CIRCUIT CONFIGURATION – Both the inlet and the outlet flaps are fully open (aircraft is on ground and the skin temperature is above a set threshold)
• CLOSED CIRCUIT CONFIGURATION – Both the inlet and outlet flaps are fully closed. The SKIN EXCHANGE INLET BYPASS VALVE is open, allowing air to the cargo under floor, eventually exiting via the outflow valve (aircraft is on the ground or in-flight and the skin temperature below a set threshold).
• INTERMEDIATE CIRCUIT CONFIGURATION – The inlet flap is fully closed, the outlet small flap is open (aircraft is in-flight and the skin temperature is above a set threshold).

Question 13

During abnormal operations, the AIR COND INLET VALVE always opens providing fresh ventilation air.

Answer 13

• BLOWER or EXTRACT FAULT – Both inlet and outlet flaps are fully closed, SKIN EXCHANGE INLET BYPASS VALVE closed.
• SMOKE CONFIGURATION – Once the BLOWER and EXTRACT pushbuttons have been selected to OVRD, the blower fan will stop, the extract fan will continue to run. The inlet flap closes, the small outlet flap opens, the SKIN EXCHANGE ISOLATION VALVE closes and the SKIN EXCHANGE INLET BYPASS VALVE closes.