Auto Flight

Question 1

Explain Takeoff Mode pitch command logic with both engines operative.

Answer 1

FD commands V2+10

Question 2

How is Takeoff Mode initial pitch determined?

Answer 2

In the MCDU using flap setting, temperature, pressure, and actual aircraft weight.

Question 3

Explain Takeoff Mode pitch limitations.

Answer 3

Minimum of 8°

Maximum of 18°

Maximum speed target is Vfe - 5 kt.

Minimum speed target is Vshaker + 10 kt for all engines operating

For one engine inoperative the minimum speed target is Vshaker + 3 kt.

Question 4

Explain Go Around mode pitch logic with one engine inoperative.

Answer 4

FD commands Vac

Question 5

Explain Go Around mode pitch logic with both engines operative.

Answer 5

FD commands Vref+20

Question 6

Explain Go Around Mode pitch limitations.

Answer 6

Minimum of 8° (if no valid info exists)

Maximum of 18°

Maximum speed target is Vfe - 5 kt.

Minimum speed target is Vshaker + 10 kt for all engines operating

For one engine inoperative the minimum speed target is Vshaker + 3 kt.

Question 7

What are the default FD modes?

Answer 7

Lateral: Roll

Vertical: FPA (Flight Path Angle)

Question 8

How is Windshear Escape Guidance activated?

Answer 8

Windshear warning or caution condition is detected and TOGA switch is pressed.

Windshear Warning condition is detected and thrust lever is set to TO/GA position.

Automatically when windshear warning condition is detected and the FD mode is in TO or GA.

Question 9

What are the FGCS vertical modes? (Eleven)

Answer 9

(1) Flight Path Angle (FPA).
(2) Takeoff (TO).
(3) Altitude Select (ASEL).
(4) Flight Level Change (FLCH).
(5) Altitude Hold (ALT).
(6) Vertical Speed (VS).
(7) Vertical Navigation (VNAV).
(8) Overspeed (OVSP).
(9) Glide Slope (GS).
(10) Go Around (GA).
(11) VGP (VGP).

Question 10

What are the FGCS lateral modes? (Six)

Answer 10

(1) Roll Hold (ROLL).
(2) Heading Select (HDG).
(3) Lateral Navigation (LNAV).
(4) Localizer (LOC).
(5) Back-course (BC).

Pilot non-selectable mode is:
(6) Track Hold (TRACK).

Question 11

What are the VNAV sub-modes? (Six)

Answer 11

ALL are annunciated in MAGENTA when active

(1) Varm
(2) Vflch
(3) Vasel
(4) Valt
(5) Vgp
(6) Vpath

Question 12

When is Windshear Escape Guidance available?

Answer 12

Below 1,500 AGL

Question 13

What Windshear Escape Guidance is provided?

Answer 13

Pitch:
Vshaker

Roll:
Wings Level

Question 14

What is VNAV sub-mode Varm?

Answer 14

No idea

Question 15

What is VNAV sub-mode Vflch?

Answer 15

(a) VFLCH is VNAV Flight Level Change and can be automatically selected by the FMS or manually by the flight crew for climb or descent.

(b) During climbs the VNAV sub mode will always be VFLCH.

(c) VFLCH engages when the Alt Selector is set to an altitude different than the current airplane altitude, VNAV is engaged and the FLCH button is pressed.

Question 16

What is VNAV submode Vasel?

Answer 16

VASEL is the VNAV altitude capture mode. It captures the Alt Selector altitude or the FMS waypoint altitude constraint.

Question 17

What is VNAV sub-mode Valt?

Answer 17

Maintains the altitude commanded by the FMS or the Alt Selector.

Question 18

What is VNAV sub-mode Vgp

Answer 18

(a) The VNAV Glide Path (VGP) mode is an FMS based non-precision approach mode created to provide a constant final approach descent path. In this mode, the FMS files a constant glide path approach from the Final Approach Fix (FAF) to the Missed Approach Point (MAP) regardless the Alt Selector altitude which may be set to the missed approach altitude.

(b) Temperature compensation calculated by the FMS does not com- pensate for VNAV temperature deviations to follow the desired geo- metric glide path when performing VGP approaches. Thus, if the outside air temperature is above ISA, the VGP flight path is higher than the geometric glide path and, if the outside air temperature is below ISA, the VGP flight path is lower.

Question 19

What is the VNAV sub-mode Vpath?

Answer 19

Uhh

Question 20

Explain FMS speed protection.

Answer 20

(a) The FMS incorporates speed reversion (transition from VPATH to VFLCH) and latched speed protection.

(b) Transition from VPATH to VFLCH: Speed reversion is active when the descent is too steep and it is not possible to maintain the selected speed. In this case, the FMS transitions to VFLCH, which maintains the speed within limits. The transition from VPATH to VFLCH automatically occurs if:

1 The speed exceeds VMO/MMO + 10 kt during VPATH descents;

2 FMS passes through a speed/altitude limit with a speed greater than 5 kt. In this case, the command is to level off until the speed deviation is below + 2 kt. Afterwards, the FMS commands VFLCH down to the Alt Selector altitude;

3 Landing Gear/Flap speed limit is exceeded by more than 10 kt;

4 In VPATH and the speed is less than VREF - 10 kt.

Question 21

After selecting APP mode what are the requirements for Appr 1? (cat 1)

Answer 21

1 RA/BARO selector set to BARO.

2 NAV frequency set to the correct LOC frequency in the MCDU.

3 V/L or preview selected.

Question 22

After selecting APP mode what are the requirements for Appr 2? (cat 2)

Answer 22

1 Both RA/BARO set to RA and Minimums set at 800 ft or above.

2 Both NAV frequencies set to correct LOC frequency in the MCDU.

3 Both PFDs set to correct LOC inbound course (V/L or Pre- view).

4 Flaps 5.

5 Altimeters within prescribed limits.

Question 23

Explain Takeoff Mode pitch command logic with one engine inoperative.

Answer 23

If current speed is less than V2
FD commands V2.

If current speed is between V2 and V2+10
FD commands present speed

If current speed is greater than V2+10
FD commands V2+10