Automatic Flight

Question 1

A/T engages automatically when following AFDS modes are engaged:
(7 items)

Answer 1

• LVL CHG
• ALT ACQ
• V/S
• VNAV
• ALT HOLD
• G/S capture
• TO/GA.

Question 2

A/T OFF:

Answer 2

disengages A/T and prevents A/T engagement.

Question 3

Changeover (C/O) Switch

Answer 3

• changes IAS/MACH display between IAS and MACH

* automatic changeover occurs at approximately FL260.

Question 4

Underspeed limiting

Answer 4

(flashing character “A”) – minimum speed

Question 5

Overspeed limiting

Answer 5

(flashing character “8”)

• Vmo or Mmo limit
• landing gear limit
• flap limit

Question 6

IAS/MACH Display

Displays speed selected by IAS/MACH selector
• display is blank when:

Answer 6

• VNAV mode engaged
• A/T engaged in FMC SPD mode
• during 2 engine AFDS go–around

Question 7

IAS/MACH Display

• display range is:

Answer 7

• 110 KIAS – Vmo in 1 kt increments

* .60M – Mmo in .01M increments.

Question 8

N1 mode engages automatically when:

Answer 8

• engaging LVL CHG in climb (except during period for 2 1/2 minutes after lift-off)
• engaging VNAV in climb.

Question 9

Speed Mode

Answer 9

Autothrottle holds speed in IAS/MACH display or a performance or limit speed. Speed mode engaged manually by pushing SPEED switch if speed mode is compatible with existing AFDS modes.

Question 10

Speed mode engages automatically when:

Answer 10

• ALT ACQ engages
• ALT HOLD engages
• V/S engages
• G/S capture occurs.

Question 11

A/T does not set thrust above displayed N1 limit, however, A/T can exceed N1 value manually set by N1 Manual Set Knob.

Answer 11

True

Question 12

VNAV Mode

Answer 12

The FMC commands AFDS pitch and autothrottle to fly vertical profile selected on FMC CDUs. Profile includes climb, cruise, descent, speeds, and can also include waypoint altitude constraints.

Question 13

VNAV Mode

Climb

Answer 13

• autothrottle holds FMC thrust limit • AFDS holds FMC target speed • automatic level off occurs at MCP altitude or VNAV altitude, whichever is reached first.

Question 14

VNAV Mode

Cruise

Answer 14

• autothrottle holds FMC target speed
• AFDS holds FMC altitude
• selecting a lower MCP altitude arms FMC to automatically begin descent upon arrival at FMC top of descent point.

Question 15

VNAV Mode

Descent

Answer 15

• VNAV SPD descent
• autothrottle holds idle
• AFDS holds FMC target speed
• VNAV PTH descent
• autothrottle holds idle but can command FMC SPD mode if ground speed becomes too slow to maintain FMC vertical path
• AFDS tracks FMC descent path
• automatic level-off occurs at MCP altitude or VNAV altitude, whichever is reached first
• VNAV constrained level-off annunciates VNAV PTH.

Question 16

VNAV mode is terminated by any one of the following:

8 items

Answer 16

• Selecting another pitch mode
• Glideslope capture
• LNAV is disengaged without localizer capture (prior to FMC U5.0)
• Transition of glideslope intercept waypoint (prior to FMC U10.3)
• Transition of glideslope intercept waypoint if G/S is armed (FMC U10.3 and later).
• flaps extended beyond 15 (prior to FMC U7.1)
• Crosstrack greater than RNP while active leg has a nav data base vertical angle (FMC U7.1 or later, but prior to U10.3)
• Crosstrack greater than twice the RNP while active leg has a nav data base vertical angle (FMC U10.3 and later).

Question 17

ALTITUDE Display

Displays selected altitude
• displayed altitude is reference for …… and ……

Answer 17

altitude alerting / automatic level– offs

Question 18

ALTITUDE Display

altitude range is ….

Answer 18

0 to 50,000 feet in 100 foot increments

Question 19

Vertical Speed Thumbwheel

Answer 19

range is –7900 to +6000 fpm.

Question 20

Vertical Speed Thumbwheel display incerements

Answer 20

• 50 fpm if V/S is less than 1000 fpm

* 100 fpm if V/S is 1000 fpm or greater.

Question 21

LVL CHG Mode

Answer 21

The LVL CHG mode coordinates pitch and thrust commands to make automatic climbs and descents to preselected altitudes at selected airspeeds.

Question 22

A LVL CHG climb or descent is initiated by:

Answer 22

• selecting a new altitude
• pushing LVL CHG switch
• setting desired airspeed.

Question 23

LVL CHG Climb

Answer 23

• autothrottle holds limit thrust

* AFDS holds selected airspeed.

Question 24

LVL CHG Descent

Answer 24

• autothrottle holds idle thrust

* AFDS holds selected airspeed.

Question 25

Airspeed in LVL CHG mode

Answer 25

• if a speed mode is active when LVL CHG is engaged, this speed is retained as target speed
• if a speed mode is not active when LVL CHG is engaged, existing speed becomes target speed
• speed can be changed with MCP IAS/MACH Selector.

Question 26

The LVL CHG mode is …. after glideslope capture.

Answer 26

inhibited