B757 Autoflight

Question 1

What is VNAV ALT

Answer 1

Airplane levels off at an MCP altitude not in the FMC climb profile.

Question 2

How do you make the jet climb in VNAV ALT?

Answer 2

Must press the Altitude intervention button.

Question 3

What is VNAV PTH?

Answer 3

Mode to remain within a DEP or waypoint constraint - an altitude/path capture

Question 4

Climbing in VNAV SPD, you are given an ATC alt restriction, if FMC calculates you won’t make the restriction will your FMA change?

Answer 4

No, remain in SPD not change to PTH

Question 5

What happens pressing a CMD switch If one F/D switch is on?

Answer 5

Autopilot engages in the selected F/D mode(s) except TO and GA.

Question 6

What mode does the autopilot engage if both FD switches are off?

Answer 6

V/S - pitch mode

HDG HOLD - roll mode

Question 7

IRS ATT MODE

Answer 7

Requires 30 sec straight and level flight

IRU does not calculate 
Acceleration
Vertical speed
Ground speed
Track
Position
Heading 
Wind

Question 8

In IRS ATT MODE, how can you input heading info?

Answer 8

Go to FMC POS INIT 5L and input the present magnetic heading

Question 9

LNAV maintains current heading when:

Answer 9

1. Passing the last active route waypoint
2. Passing the last waypoint prior to a route discontinuity
3. Passing the last route offset waypoint
4. Activating the inactive route or activating an airway intercept and not within LNAV engagement criteria

Question 10

When is VNAV DEACTIVATED?

Answer 10

1. Mode selection:
   a. ALT HOLD
   b. FLCH
   c. GA
   d. SPD
   e. THR
   f. V/S
2. Pushing VNAV a second time when VNAV armed
3. GS captured

Question 11

Bank Limit Selector

Answer 11

AUTO
25 degrees at low true airspeeds
15 at high true airspeeds

MANUAL
5,10,15,20,25

Question 12

Heading HOLD

Answer 12

Push
Selects HDG HOLD roll mode
Displays on each FMA
AFDS rolls wings level and holds present heading

Question 13

VERT SPD

Answer 13

Displays selected vertical speed
Blank when V/S mode not selected 
Range from -8000 to + 6000
If VERT SPD engaged from FLCH or VNAV
A/T Automatically engaged in SPD mode if armed

Question 15

What altitude is displayed in ALT window when power first applied?

Answer 15

10,000 feet

Question 16

What does pushing the altitude button do during climb or descent?

Answer 16

With altitude constraints, each button push deletes the next waypoint altitude constraint between the airplane altitude and the MCP altitude window setting

Question 17

What does pushing the ALT selector button in cruise?

Answer 17

1. With altitude window set above or below FMC cruise altitude, resets FMC cruise altitude to the altitude window altitude.
2. When in VNAV PTH or VNAV ALT pitch mode, initiated a climb or descent toward the altitude window altitude.
3. Within 50 nm of T/D point, with the altitude window set below cruise altitude, initiates the DES NOW feature.

Question 18

What is unique about B\CRS MODE?

Answer 18

1. Requires concurrent use of LOC MODE

2. Single autopilot function only. Cannot use multiple autopilots.

Question 19

How can you disarm B/CRS?

Answer 19

Primary - press B/CRS a second time before localizer capture

Secondary - press the LOC Switch a second time. Disarms both LOC & B/CRS

Question 20

How far from end of a route offset does FMC advise you?

Answer 20

2 minutes

Question 21

How far off the FMC route can an offset be flown?

Answer 21

99 miles

Question 22

How many and what are the Autothrottle Modes?

Answer 22

6

THR
THR REF
HOLD
IDLE
SPD
EPR

Question 23

How many and what are the Roll Modes?

Answer 23

6 Engaged

HDG HOLD
HDG SEL
LNAV
LOC
ROLLOUT
TO/GA

3 ARMED
LOC
ROLLOUT
LNAV

Question 24

How many and what are the Pitch Modes?

Answer 24

9 Engaged

TO/GA
ALT
V/S
VNAV PTH
VNAV SPD
VNAV ALT
G/S
FLARE
FLCH SPD

3 ARMED
G/S
FLARE
VNAV

Question 25

Approach setup acronym?

Answer 25

L
A
V
S

Question 26

Data relating primarily to automatic flight is provided by?

Answer 26

3

1. FCCs
2. A/T
3. FMC

Question 27

Data which is used to display aircraft state is supplied by?

Answer 27

Navigation radios
FMC
IRS

Question 28

Autopilot trims at what rate and why?

Answer 28

• Half rate

* only uses one stab trim module

Question 29

AUTOPILOT (discrete light)

Answer 29

Autopilot Engaged but in a degraded mode

Question 30

How is an FMA MODE change indicated?

Answer 30

Green box around FMA MODE for 10 seconds

Question 31

Which ASA change is allowed below 200’?

Answer 31

NO AUTOLAND

Question 32

FD switches display?

Answer 32

Associated FXC output for pitch and roll.

Question 33

FMC

Answer 33

L is primary

R is backup

Question 34

Fail Operational

Answer 34

Autoflight System capable of completing the approach and landing following failure of any single system component after passing a specified point - Alert Height

Question 35

Fail Passive

Answer 35

Autoflight System in which, in the event of a failure, the failure causes no significant deviation of aircraft flight path or attitude.

Question 36

Descent Direct

Answer 36

Descends at IDLE without reference to any altitude restrictions in the FMC

Question 37

When LOC captures what happens to the selected heading?

Answer 37

HDG changes to reflect the inbound LOC course.

Question 38

What happens at 1500 on an ILS approach?

Answer 38

Pre-Autoland test.

Question 39

What occurs at 500’ with a Crosswind?

Answer 39

RWY alignment.

Question 40

What happens at 45’?

Answer 40

FLARE engages

Question 41

What functions engages at GS capture?

Answer 41

GA is armed

Question 42

GA

Answer 42

• Thrust set for 2000 fpm
• FD displays even with FD switch off
• ROLL - maintains ground track
• Pitch - maintains the higher of 
               MCP SPEED at GA initiation