Tough Questions

Question 1

What are the 11 components of the hydraulic system A?
(A REAL GIANT P)

Answer 1

1. Autopilot A
2. Rudder
3. Elevator and feel
4. Ailerons
5. Landging gear
6. Ground spoilers
7. Inboard spoilers
8. Alternate brakes
9. Normal nose wheel steering
10. Thrust Reverser No1
11. PTU

Question 2

System annunciator panel cover what?

Answer 2

• Aft, Fwd, fire control

Question 3

Where is the Air starter located?

Answer 3

IGD N2 shaft

Question 4

Cross bus tie in normal?

Answer 4

Closed and in auto

Question 5

GEN OFF BUS?

Answer 5

IDG not supplying to RELATED transfer bus

Question 6

WS1.Whats does the PSEU caption indicate, Will it illuminate in flight?(3)

Answer 6

• T/O config, LND config, LND gear, Air/ground sensing.
• Overwing exit fails to disengage lock
• Inhibited from TL advance to 30’ seconds after landing.

Question 7

What happens if a DEU fails in AUTO?

Answer 7

‘DISPLAY SOURCE’ amber caption in flight
‘CDS FAULT’ (Common Display Fault) on ground, not dispatchable Either EEC will drop into ‘ALTN’
Some Hyd & FF indications will occult

Question 8

Which is the primary FCC?

Answer 8

Switches with MA switch

Question 9

What does RNP enable the aircraft to do?

Answer 9

• Allows the aircraft to fly between defined points in space

Question 10

What is actual navigation performance?

Answer 10

• It is the FMC’s estimated max position error with a 95% probability. It means that the FMC is 95% certain that the aircrafts actual position lies within a circle with a radius if the ANP value around the FMC position.

Question 11

When does an amber ‘ENG FAIL’ show on the EGT gauge?

Answer 11

<50% N2 and eng start lever (ESL) at idle detent

Question 12

If a secondary engine limit is exceeded in flight how is the crew notified?

Answer 12

The blanked lower DU will come up, individual warnings are then displayed on each parameter, either in red, amber or contrast inverted

Question 13

If hyd A or B fail with the associated REV deploy?

Answer 13

Yes, but a t reduced speed (circa 50% slower than norma via stby hyd)

Question 14

When is STBY PWR activated in AUTO?

Answer 14

AC trans BUS 1 and DC BUS 1 lose power

Question 15

What are norm and stby power supplies for the stby AC BUS?

Answer 15

Normal from AC trans BUS 1
Stby from the static inverter from the battery

Question 16

During cruise where is the CTBR?

Answer 16

Closed

Question 17

What could cause BLEED TRIP OFF, how to restore?

Answer 17

Overtemp or over pressure, iaw the QRH press the trip reset

Question 18

Which duct is external (pneumatic) air connected?

Answer 18

The right bleed air manifold (don’t confuse with pre conditioned air)

Question 19

What is the thrust limit with DUAL BLEED on and why?

Answer 19

Not above idle on the engines to avoid over back pressure damaging the APU

Question 20

With bleed off what do engine and wing TAI do?

Answer 20

Engine TAI stays on, wing TAI goes off

Question 21

EDP on system B (right engine) springs a leak, how is system preserved?

Answer 21

It isnt, both EDP B and EMDP B feed from the same stand pipe so system B will run dry with a down stream leak in either.
However. There is a stand pipe in hyd resevoir B to preserve fluid for the PTU.

Question 22

Do mechanical controls from both control wheels attach to the same thing?

Answer 22

No, Capt’s roll is connected to ailerons, FOs to spoilers, both wheels connected together. If there’s a jam on one side the other respective control surfaces will move. (but NB spoilers always need hyd A or B pressure)

Question 23

FEEL DIFF PRESS?

Answer 23

Comes on with 30 sec of differential (>25%) between hyd A and B pressure. Will come on and cause a MC 30 secs after you swx on the ELEC 1 hyd pump pre start (as the ELEC 2 remains off until bypass pin confirmed)

Question 24

How are STS and mach trim controlled?

Answer 24

By the AP FCCs, even if AP not engaged

Question 25

What is the function of the stab trim override swx on the aft electrics panel?

Answer 25

Reverse electric trim is inhibited (ie cant trim up while pressing forward), this override switch allows reverse trim (should someone slump fwd on the controls allows the other person to trim back)

Question 26

When does electric and AP trim speed change?

Answer 26

Flap not up = hi speed
Flap up = low speed

Question 27

What does auto slat do in ref to a stall?

Answer 27

Any time the LE slats are extended (1/2) and approaching stall is detected they are moved to fully extended
(SPF this is in flap 1-25)
(Non SPF this is in flap 1-5)

Question 28

What happens when you select alt flap to ARM?

Answer 28

Closes TE flap bypass valve, activates stby hyd pump and arms the alt flap swx

Question 29

Normal LVP criteria?

Answer 29

200ft ceiling and 800m RVR

Question 30

What are the criteria for the LGTU to work?

Answer 30

• Airborne
• no 1 eng fail
• gear handle up
• EITHER main leg not locked up

Question 31

Is anti-skid available with altn or accumulator braking

Answer 31

Yes, but works on pairs of wheels on altn. Reverts to individual wheels with accumulator as it is back through the normal (hyd B) valves

Question 32

When do auto brakes come on?

Answer 32

Both TLs at closed and main wheels >60 kts

Question 33

What causes a COWL ANTI ICE amber?

Answer 33

Overpressure only

Question 34

What happens if you select wing TAI on the gnd?

Answer 34

Slat temp is monitored to prevent overheating, the TAI will cycle on and off to maintain temp and the blue valve lights will switch bright to dim and cycle

Question 35

Selecting eng TAI off, the valve stays bright blue, what does this mean?

Answer 35

Valve not shut, if >10 deg TAT limit that engine to 80% N1 if possible