Engines

Question 1

During an automatic start on the ground, the FADEC protects against:

Answer 1

Hot starts, hung starts, engine stalls, or no light up.

Question 2

FADEC will not allow the translating sleeves to deploy unless:

Answer 2

Positional data from the LGCIUs and thrust lever position is confirmed by at least one SEC.

Question 3

What occurs after a FADEC failure?

Answer 3

Each engine is equipped with a two channel FADEC. If one channel fails, the other channel is fully capable of operating the engine.

Question 4

When an _____ _____ _____ pb is used with the ENG MODE selector in the _____ position, the ENG MAN START pb must be selected to _____ to close the engine’s start valve.

Answer 4

ENG MAN START, CRANK, OFF

Question 5

The FADEC automatically activates continuous ignition with both igniters if:

Answer 5

• Approach idle is selected.
• The ENG MASTER lever is cycled from ON to OFF and then back to ON.
• If the Engine Interface Unit, EIU, fails.

Question 6

The three FADEC idle modes are:

Answer 6

• Approach
• Modulated
• Reverse

Question 7

Why do the CEOs and NEOs have a significant temperature difference?

Answer 7

The temperature difference partly has to do with the location of the temperature probes.

Question 8

When would you intentionally switch to IGN while airborne?

Answer 8

During heavy rain or turbulence, or an EIU data failure.

Question 9

What is the purpose of enabling N1 Mode?

Answer 9

The flight crew would enable N1 Mode if one of the EPR probes were inoperative. This tells the FADEC to monitor N1 instead.

N1 Mode would be enabled for both engines to provide symmetric thrust.

Question 10

What is Modulated Idle?

IAE V2500

Answer 10

Is regulated according to:
- Bleed system demand
- Ambient conditions

Is selected:
- In flight, when the flaps are retracted (FLAPS lever at zero position)
- On ground, provided reverse is not selected.

Question 11

What is Approach Idle?

IAE V2500

Answer 11

• Is regulated according to aircraft altitude, regardless of bleed system demand.
• Is selected in flight, when the flaps are extended (FLAPS lever not at zero
  position).
• Allows the engine to accelerate rapidly form idle to go-around thrust.

Question 12

What is Reverse Idle?

IAE V2500 + PW1100G

Answer 12

• Is selected on ground, when the thrust lever is in REV IDLE position.
• Is slightly higher than forward idle thrust.

Question 13

What is Minimum Idle?

PW1100G

Answer 13

Is regulated according to:
- Bleed system demand
- Ambient conditions

Is selected:
- In flight, when the landing gear is retracted and not in CONF 3 or FULL.
- On ground, provided reverse is not selected.

Question 14

What is Approach Idle?

PW1100G

Answer 14

• Is regulated according to aircraft altitude, regardless of bleed system demand.
• Is selected in flight, in CONF 3 or FULL, or when the landing gear is down.
• Allows the engine to accelerate rapidly from idle to go-around thrust.

Question 15

When does the FADEC automatically activate continuous ignition with both igniters? (PW1100G)

Answer 15

• PW1100G (STIF)
  o Engine flame out detected
  o Surge detected
  o Thrust control malfunction detected
  o Ignition delay during start

Question 16

When does the FADEC automatically activate continuous ignition with both igniters? (IAE V2500)

Answer 16

• IAE V2500 (TEA FAUM)
  o Engine anti-ice PB switch at ON
  o Max TO thrust selected (EPR or Rated N1 mode)
  o Flex to thrust selected (EPR mode)
  o EIU data failed (ignition and/or bleed config data)
  o Approach idle selected
  o Inflight unscheduled sub idle or surge
  o Master lever cycled from ON to OFF then back to ON position