Flight Instruments and Displays (HGS)

Question 1

The primary flight display (PFD) VNAV Speed Band indicates FMC targeted airspeed during VNAV path descents. The upper and lower limits of this band indicate _________ .

a. Upper limit – autothrottle disconnect, lower limit – autothrottle wake up
b. Upper limit – transition from VNAV path to VNAV Speed, lower limit 1.3 stall margin
c. Upper limit – transition from VNAV path to VNAV speed, lower limit – autothrottle wake up
d. None of the above

Answer 1

Upper limit – transition from VNAV path to VNAV speed, lower limit – autothrottle wake up

Reference: FRM 10.1.2.1

Question 2

What are the display modes of operation for the HGS?

a. Primary (PRI), Approach, VMC
b. AIII approach, IMC, VMC
c. Primary (PRI), AIII approach, IMC and VMC
d. IMC, VMC and Primary (PRI)

Answer 2

Primary (PRI), AIII approach, IMC and VMC

Reference: FRM 10.2.2

Question 3

The following ILS approach criteria are required in the HGS AIII mode, _______ .

a. Both VHF navigation receivers are tuned to an ILS frequency and VHF #1 or VHF #2 localizer deviation is less than approximately ¼ dot and glideslope deviation is less than approximately 1¼ dots for at least five seconds
b. The difference between the aircraft’s magnetic track and the Captain’s selected course is less than 15°
c. Radio altitude is greater than 500 ft
d. All of the above

Answer 3

All of the above

References: FRM 10.6.2.2, FRM 10.6.2.3

Question 4

When using the HGS in VMC mode for a visual approach, it is critical to ensure _______ ?

a. Visual conditions are above 5000/5 exist
b. It is selected prior to turning a straight-in visual final
c. Proper mechanical alignment of the combiner
d. ILS approach frequency is active for the selected runway

Answer 4

Proper mechanical alignment of the combiner

Reference: FRM 10.6.2.5

Question 5

What does the “ALIGN HUD” message indicate?

a. The frequency and selected course do not agree with the NAV information being received
b. Crosswind is sufficient to cause the flight path vector to move off scale
c. Projector is not angled properly – call maintenance
d. Combiner is not in the correct position in IMC or VMC modes

Answer 5

Combiner is not in the correct position in IMC or VMC modes

Reference: FRM 10.6.1.4

Question 6

The flight path acceleration symbol on the HGS indicates ______ when it is below the flight path vector.

a. The aircraft is accelerating
b. The aircraft is decelerating
c. The aircraft is in steady flight
d. The aircraft is climbing

Answer 6

The aircraft is decelerating

Reference: FRM 9.2.7.2

Question 7

The Speed Error tape on the HGS displays the difference between indicated airspeed and the reference speed selected on the mode control panel. The tape length is equal to the diameter of the flight path circle, and represents approximately ________ kts of error. The maximum tape length is limited to _______ kts of error.

a. 10 kts, 20 kts
b. 5 kts, 25 kts
c. 5 kts, 15 kts
d. 5%, 20%

Answer 7

5 kts, 15 kts

Reference: FRM 9.2.8.6.2

Question 8

When landing, the Runway edge lines will appear in the HGS between ______ and _______ ft radio altitude?

a. Between 1000 and 50 ft radio altitude
b. Between 500 ft radio altitude and touchdown
c. Between 750 and 50 ft radio altitude
d. Between 300 and 60 ft radio altitude

Answer 8

Between 300 and 60 ft radio altitude

Reference: FRM 10.9.2.1

Question 9

On landing, tail strike monitoring becomes active on selected HGS systems below ________ when a tail strike is likely.

a. 50 ft AGL
b. 100 ft AGL
c. 10 ft AGL
d. 50 ft AGL

Answer 9

100 ft AGL

Reference: FRM 10.9.3