Engine

Question 1

SOP Engine start sequence:

Answer 1

1- Captain “Start engine 1”, FO “ starting engine 1”
2-start/stop knob start, then run
3- chronometer star
4-guard start stop switch
5- observe N2 up at start
6- cut start if N2 indication + 10 seconds no positive oil pressure
7- at 7% N2 IGN A or B displayed
8- at 20% N2 - N1 up + FF up
9- 5 seconds after FF =‘light off- ITT up - FADEC fuel flow <120 degrees - if ITT > 120 degrees FADEC dry crank
10- cut if both IGN + fuel reapplied + 15 seconds = no ITT indication
11- 50% N2 IGN A or B extinguishes + oil pressure = positive indication

Question 2

SOP During start, cut engine if:

Answer 2

• N1/N2 don’t go up = hung start
• N1 doesn’t rotate or down
• ITT rapidly near 740 degrees (hot start)
  -oil pressure below 25 psi
• intermittent electrical, pneumatic or starter malfunction before N2 50% and starter disengagement
• if tail wind, N1 no indication before starter cutout (50%) = cut engine and move aircraft

Question 3

Engine good start means:

Answer 3

• N1 22%
• ITT 480 degrees
• N2 63%
• FF 200 kg/ h
• oil pressure > 25psi
  Caret up = ITT limit red up

Question 4

E2 SOP Engine start sequence:

Answer 4

1- Captain “Start engine 1”, FO “ starting engine 1”
2-start/stop knob start, then run
3- chronometer star
4-guard start stop switch
5- observe N2 up at start
6- cut start if N2 indication + 10 seconds no positive oil pressure
7- at 20% to 27% N2 IGN A or B displayed
8- at 20% to 27% N2 - N1 up + FF up
9- 5 seconds after FF =‘light off- ITT up - FADEC will perform dry motoring before every engine start. This dry motoring can take 40 to 80 seconds based on engine parameters at the moment of engine start
10- cut if both IGN + fuel reapplied + 15 seconds = no ITT indication
11- if N2 reaches 45% and no N1= cut engine
12- 55% N2 IGN A or B extinguishes + oil pressure = positive indication
13- cut if after 120 seconds after fuel flow, engine doesn’t accelerate

Question 5

SOP E2 After a Hot Start attempt a second start attempt is only authorized if:

Answer 5

— During the first start the only engine parameter with abnormal indication was ITT; — During engine start no engine related EICAS msg was displayed; — No abnormal noise, like an engine stall sound (bang) or sound of pneumatic pressure leakage was heard. If any of the items above happens maintenance personnel must be contacted.

Question 6

SOP E2 After a Hot Start attempt a second start attempt is only authorized if:

Answer 6

— During the first start the only engine parameter with abnormal indication was ITT; — During engine start no engine related EICAS msg was displayed; — No abnormal noise, like an engine stall sound (bang) or sound of pneumatic pressure leakage was heard. If any of the items above happens maintenance personnel must be contacted.

Question 7

SOP E2 During start, shut down engine if:

Answer 7

• N1 doesn’t rotate or down after N2 reaches 45%
• ITT rapidly near 900 degrees (hot start)
  -oil pressure below 50 psi
• intermittent electrical, pneumatic or starter malfunction before N2 50% and starter disengagement
• If the engine requires more than 120 seconds (2 minutes) to accelerate from fuel applied (Fuel Flow indication) to stabilizing in idle.

Question 8

IGNITION 1 and IGNITION 2 KNOBS

OVRD

Answer 8

enables FADEC to continuously activate both exciters when the engine is running

Question 9

EICAS: N1 WING ANTI-ICE CYAN LINE

Answer 9

Displayed only in icing conditions during final approach (radio altimeter below 1200 ft) with landing gear down or flaps extended.

– Indicates the minimum thrust level (N1 value) to meet bleed requirements

Question 10

For the first 60 s during engine start and with thrust levers at IDLE, the engine vibration indication will be displayed in

Answer 10

amber for values equal to or greater than 5.0 units, for HP indication only.

Question 11

Transient LP or HP high vibration indication without any other abnormal engine parameter indication may be considered

Answer 11

normal according to the engine manufacturer

Question 12

The oil system lubricates and cools the turbine engine main shaft bearings and

Answer 12

the accessory gearbox

Question 13

The engine starting system consists of:

Answer 13

– Air Turbine Starter (ATS).

– Starter control valve (SCV

Question 14

The FADEC opens the Starter Control Valve (SCV), providing bleed air from the

Answer 14

APU, a ground source, or the opposite engine

Question 15

The FADEC is the main component of the engine control system.

Its functions include:

Answer 15

– Engine protection;

– Control of the requested and max N1;

– Control of the ATTCS.

Question 16

The ATTCS automatically commands RSV whenever it is engaged, thrust levers are at TO/GA position, and one of following conditions occurs:

Answer 16

– Difference between both engine N1 values is greater than 15%;

– One engine failure during takeoff;

– One engine failure during go-around;

– Windshear detection.

Question 17

The minimum flex takeoff thrust is limited to

Answer 17

75% maximum rated takeoff thrust or CLB-2 + 1% N1, whichever is higher.

Question 18

The thrust rate modes are the following:

Answer 18

—Takeoff (TO-1, TO-2, TO-3)

– Takeoff Reserve (TO-1 RSV, TO-2 RSV, TO-3 RSV)

– Go-Around (GA)

– Go Around Reserve (GA-RSV)

– Maximum Continuous Thrust (CON)

– Maximum Climb (CLB-1, CLB-2)

– Maximum Cruise (CRZ)

– Idle

Question 19

The idle mode selections are the following:

Answer 19

– Flight Idle.

– Approach Idle.

– Final Approach Idle.

– Ground Idle.

Question 20

The FADEC provides engine start protection on the ground as follows:

Answer 20

– Hung start.

– Hot start.

– No light-off