Autopilot

Question 1

How does the AFDS control the flight control surfaces?

Answer 1

Via fly-­‐by-­‐wire control system.

Question 2

When does the autopilot control the rudder?

Answer 2

Only during APP & LDG.

Question 3

Where are the autopilot mode engagements indicated?

Answer 3

FMA blocks on the PFD.

Question 4

Which autopilot modes have an arming phase?

Answer 4

• Roll modes: o LNAV. o LOC. o ROLLOUT.

* Pitch modes: o VNAV. o G/S. o FLARE.

Question 5

Which mode cannot be disengaged by selection of another mode?

Answer 5

APP mode after LOC or G/S capture.

Question 6

After ILS capture and above 1500’, what happens if APP mode is reselected?

Answer 6

APP mode deselects and AFDS reverts to default roll & pitch modes

Question 7

When will override of the rudder pedals cause autopilot disengagement?

Answer 7

Only W/ LAND 2 or LAND 3 annunciated.

Question 8

What will occur with a continued autopilot mode degradation?

Answer 8

A/P remains engaged in an attitude stabilising mode initially (degraded mode) followed by the display of an amber line through the associated mode and finally an EICAS message AUTOPILOT.

Question 9

How is the flight director affected by a mode degradation?

Answer 9

F/D initially command an attitude stabilising command based on inertial data. If degradation continues, individual F/Ds (roll/pitch) disappear until degradation no longer detected.

Question 10

With the flight directors OFF, will a TOGA selection cause them to appear?

Answer 10

Yes if TOGA armed for a GA, airspeed > 80kts and flaps are out of up.

Question 11

What protections will cause the flight director bars to disappear?

Answer 11

• F/D mode failure in either pitch or roll causes the respective F/D bar to disappear. • Stall & overspeed protection functions cause pitch F/D to disappear.

Question 12

During an autoland, will a degradation to LAND 2 be displayed on EICAS?

Answer 12

Yes, unless ACFT is BLW 200’ (to limit distraction on short final [transition to NO AUTOLAND is never inhibited]).
EICAS message displayed for any fault which limits capability of the automatic LDG system.

Question 13

What two occasions will cause a green box to appear around an FMA mode?

Answer 13

• When a mode is first activated/engaged (green box appears for 10s). • When amber line through a degraded mode is removed (green box appears for 10s).

Question 14

What is the autothrottle controlling to when THR is annunciated?

Answer 14

A/T applies thrust to maintain V/S REQD by pitch mode.

Question 15

At what distance to the active route leg will LNAV engage, if armed?

Answer 15

2.5nm.

Question 16

What are the conditions for the roll mode ATT to engage?

Answer 16

If A/P or F/D engaged W/ bank angle > 5o.

Question 17

When is TOGA mode armed in flight?

Answer 17

Whenever flaps are out or G/S captures.

Question 18

When does ROLLOUT mode engage?

Answer 18

BLW 2’ RA on LDG (displayed BLW 1500’ RA).

Question 19

After a TOGA takeoff, what is the maximum speed the pitch mode will command?

Answer 19

V2 + 25.

Question 20

Where does the AFDS get the V2 speed; MCP or CDU?

Answer 20

AFDS uses the speed set in the MCP IAS/MACH window.

Question 21

When will VNAV engage if armed for takeoff?

Answer 21

400’.

Question 22

After an altitude conflict, how is the VNAV ALT mode cancelled?

Answer 22

By changing the altitude value set in the MCP ALT window and pushing the ALT selector, or changing the pitch mode.

Question 23

When does the FLARE mode engage?

Answer 23

During autoland between 60 – 40’ RA.

Question 24

Can the autothrottle be operated without the flight director or autopilot?

Answer 24

Yes (in this condition, A/T operates in THR REF, SPED, HOLD or IDLE modes).

Question 25

When does IDLE mode occur?

Answer 25

IDLE displayed when A/T moves thrust levers to idle.

Question 26

Can the autothrottle engage automatically?

Answer 26

Yes.

Question 27

Can the autothrottle be engaged if only one servomotor is serviceable?

Answer 27

Yes (in this case EICAS will show AUTOTHROTTLE L/R).

Question 28

In which mode will the autothrottle not reposition the thrust levers?

Answer 28

HOLD mode.

Question 29

What action causes a normal autothrottle disconnection during landing?

Answer 29

When either thrust lever raised to reverse idle.

Question 30

What are the initial TOGA flight director commands upon engagement?

Answer 30

• Pitch command is 8o nose up. • Roll command is wings level.

Question 31

During takeoff, when can the TOGA witches be used for autothrottle engagement?

Answer 31

Speed < 50kts on T/O roll or ABV 400’ (if not activated by 50kts). (Activates in THR REF mode).

Question 32

What does selection of TOGA above 80kts do?

Answer 32

Disarms LNAV & VNAV.

Question 33

What type of altitude is used for LNAV and VNAV engagements?

Answer 33

LNAV: 50’ RA.

• VNAV: 400’ ABV RWY ELEV

Question 34

What is the maximum speed commanded after lift off, if an engine fails?

Answer 34

V2 + 15.

Question 35

What does a TOGA selection do immediately after takeoff?

Answer 35

Removes T/O derates and A/T actives in THR REF.

Question 36

What is the pitch speed command at acceleration altitude?

Answer 36

5kts BLW T/O flap placard speed of the commanded flap position.

Question 37

What is the VNAV climb speed when in clean configuration?

Answer 37

Speed transition associated with origin airport or VREF + 80, whichever is higher.

Question 38

What is the autothrottle mode for a single push go-­‐around?

Answer 38

THR.

Question 39

After a go-­‐around, when can TOGA be terminated?

Answer 39

TOGA mode can be terminated ABV 400’ (if BLW 400’, disconnect A/P and turn off both F/Ds. After automatic LNAV activation, a different roll mode can be selected)

Question 40

After reaching the missed approach altitude, what is the autothrottle mode?

Answer 40

SPD.

Question 41

What are the three forms of autopilot envelope protection?

Answer 41

• Stall protection. • Overspeed protection. • Bank angle protection