B747 Exam
Sets Questions With Reviewed
Correct Detailed Answers
New Update!!
1. During landing gear extension, state what happens if any gear position
disagrees with lever position after normal transit time? - ANSWER The
EICAS changes to the expanded non-normal format
Affected gear displayed as in transit, or UP if the gear never unlocked from the up
position
2. How does the gear extend through the alternate gear extension system? -
ANSWER By pushing the Alternate Gear Extend switches
The gear uplocks and gear door latches are electrically released
The gear free-falls
Gravity and air loads extend the gear
Springs pull the downlocks into the locked posistion
3. When does the body gear steering operate? - ANSWER When the nose
wheel steering angle exceeds 20 degrees.
4. When is body gear steering activated and when is it deactivated? - ANSWER
Ground speed decreasing through 15 knots.
Ground speed increasing through 20 knots.
,5. What is the purpose of the brake accumulator? - ANSWER Provides
parking brake application
6. Describe the difference between normal and alternate anti-skid braking
systems. - ANSWER Normal brake antiskid provides each main gear with
individual antiskid protection.
Alternate brake antiskid provides antiskid protection to lateral wheel pairs
(forward and/or aft pair on each truck), rather than to individual wheels
7. How does the brake torque limiter function in the Alternate brake system? -
ANSWER Brake torque is sensed on an individual wheel basis.
Signal sent to alternate anti-skid valve.
Brake pressure is released on a laterally paired wheel basis.
8. When do the auto brakes apply after landing? - ANSWER All thrust levers
are closed.
Ground mode sensed.
The wheels have spun up.
9. Which systems contribute to total airplane deceleration on landing and
reduces autobrake pressure? - ANSWER Thrust reverse
Spoilers
10. Give examples of what would disarm the autobrakes after landing. - ANSWER
Pedal braking applied
,Any thrust lever advanced after landing
Speedbrake lever moved to DOWN detent after speedbrakes have been deployed
on the ground
DISARM or OFF position selected on the Autobrakes selector
Autobrake fault
Normal antiskid system fault
Loss of normal hydraulic pressure
11. Which hydraulic system pressurizes the brake accumulator? - ANSWER
System 4
12. Can the airplane be stopped with normal accumulator pressure? - ANSWER
No, the accumulator is not designed to stop the aircraft
13. Why is it necessary to pressurize hydraulic system 4 before pressurizing the
other systems? - ANSWER Precludes the transfer of hydraulic fluid from
system 1 or 2 into system 4, when the parking brake is set, and then released.
14. What provides automatic brake source selection? - ANSWER Pressure-
operated selector valves
15. What value on the brake temperature monitoring system causes the BRAKE
TEMP Advisory EICAS message to appear? - ANSWER 5
16. How many Flap Control Units (FCUs) are provided? - ANSWER Three
, 17. What are the primary functions of the FCUs? - ANSWER Primary control
Secondary control
Indication and annunciation
18. How many groups of leading edge flaps are provided, and how are they
normally powered? - ANSWER Three groups on each wing: outboard,
midspan, and inboard section.
Normally pneumatically powered from the bleed air duct.
19. What are the two groups of trailing edge flaps, and how are they powered? -
ANSWER Inboard and outboard.
Inboard powered by hydraulic system 1 and outboard by system 4
20. How are opposite trailing edge flaps connected? - ANSWER Mechanically,
in order to maintain symmetry.
What protection features do FCUs provide for trailing edge flaps in primary
mode? - ANSWER Asymmetry protection
Flap load relief
Flap position information to EICAS and other systems
What protection features do FCUs provide for trailing edge flaps in secondary
mode? - ANSWER Asymmetry protection
Flap position information to EICAS and other systems
Sets Questions With Reviewed
Correct Detailed Answers
New Update!!
1. During landing gear extension, state what happens if any gear position
disagrees with lever position after normal transit time? - ANSWER The
EICAS changes to the expanded non-normal format
Affected gear displayed as in transit, or UP if the gear never unlocked from the up
position
2. How does the gear extend through the alternate gear extension system? -
ANSWER By pushing the Alternate Gear Extend switches
The gear uplocks and gear door latches are electrically released
The gear free-falls
Gravity and air loads extend the gear
Springs pull the downlocks into the locked posistion
3. When does the body gear steering operate? - ANSWER When the nose
wheel steering angle exceeds 20 degrees.
4. When is body gear steering activated and when is it deactivated? - ANSWER
Ground speed decreasing through 15 knots.
Ground speed increasing through 20 knots.
,5. What is the purpose of the brake accumulator? - ANSWER Provides
parking brake application
6. Describe the difference between normal and alternate anti-skid braking
systems. - ANSWER Normal brake antiskid provides each main gear with
individual antiskid protection.
Alternate brake antiskid provides antiskid protection to lateral wheel pairs
(forward and/or aft pair on each truck), rather than to individual wheels
7. How does the brake torque limiter function in the Alternate brake system? -
ANSWER Brake torque is sensed on an individual wheel basis.
Signal sent to alternate anti-skid valve.
Brake pressure is released on a laterally paired wheel basis.
8. When do the auto brakes apply after landing? - ANSWER All thrust levers
are closed.
Ground mode sensed.
The wheels have spun up.
9. Which systems contribute to total airplane deceleration on landing and
reduces autobrake pressure? - ANSWER Thrust reverse
Spoilers
10. Give examples of what would disarm the autobrakes after landing. - ANSWER
Pedal braking applied
,Any thrust lever advanced after landing
Speedbrake lever moved to DOWN detent after speedbrakes have been deployed
on the ground
DISARM or OFF position selected on the Autobrakes selector
Autobrake fault
Normal antiskid system fault
Loss of normal hydraulic pressure
11. Which hydraulic system pressurizes the brake accumulator? - ANSWER
System 4
12. Can the airplane be stopped with normal accumulator pressure? - ANSWER
No, the accumulator is not designed to stop the aircraft
13. Why is it necessary to pressurize hydraulic system 4 before pressurizing the
other systems? - ANSWER Precludes the transfer of hydraulic fluid from
system 1 or 2 into system 4, when the parking brake is set, and then released.
14. What provides automatic brake source selection? - ANSWER Pressure-
operated selector valves
15. What value on the brake temperature monitoring system causes the BRAKE
TEMP Advisory EICAS message to appear? - ANSWER 5
16. How many Flap Control Units (FCUs) are provided? - ANSWER Three
, 17. What are the primary functions of the FCUs? - ANSWER Primary control
Secondary control
Indication and annunciation
18. How many groups of leading edge flaps are provided, and how are they
normally powered? - ANSWER Three groups on each wing: outboard,
midspan, and inboard section.
Normally pneumatically powered from the bleed air duct.
19. What are the two groups of trailing edge flaps, and how are they powered? -
ANSWER Inboard and outboard.
Inboard powered by hydraulic system 1 and outboard by system 4
20. How are opposite trailing edge flaps connected? - ANSWER Mechanically,
in order to maintain symmetry.
What protection features do FCUs provide for trailing edge flaps in primary
mode? - ANSWER Asymmetry protection
Flap load relief
Flap position information to EICAS and other systems
What protection features do FCUs provide for trailing edge flaps in secondary
mode? - ANSWER Asymmetry protection
Flap position information to EICAS and other systems
