Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

787 > CH12 FUEL > Flashcards

CH12 FUEL Flashcards

(164 cards)

Start Studying
1
Q

What does the ON position of the fuel pump switch indicate?

A

The fuel pump is selected ON.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What does the OFF position of the fuel pump switch indicate?

A

The fuel pump is selected off.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does an illuminated amber light for Forward and Aft Fuel Pump Pressure indicate?

A

Fuel pump output pressure is low.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does an illuminated amber light for Center Fuel Pump Pressure indicate?

A

Fuel pump output pressure is low with the pump selected ON.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Under what condition is the illumination of the Center Fuel Pump Pressure light inhibited?

A

When the center tank fuel pump switch is selected off.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does the ON position of the CROSSFEED switch indicate?

A

The crossfeed valve is selected open.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does the OFF position of the CROSSFEED switch indicate?

A

The crossfeed valve is selected closed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does an illuminated amber CROSSFEED VALVE light indicate?

A

The crossfeed valve is not in the selected position.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does the ON position of the BALANCE switch indicate?

A

The balance system is selected on.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the conditions under which the BALANCE switch can be OFF?

A
  • System is not commanded ON
  • Off is manually selected
  • Fuel balance is automatically commanded off for one of the following:
    • Fuel is balanced
    • Jettison system is active
    • FUEL DISAGREE message is displayed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does the BALANCE Switch do when it is ON?

A

The balance system is selected on.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does it mean when the BALANCE Switch is OFF?

A

The system is not commanded ON, off is manually selected.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When is the fuel balance automatically commanded OFF?

A

When one of the following occurs:
* fuel is balanced
* jettison system is active
* FUEL DISAGREE message is displayed
* FUEL QTY LOW message is displayed
* airplane is on ground and either engine running

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does an illuminated (amber) Fuel BALANCE FAULT Light indicate?

A

A system fault has occurred and the fuel balance system is inoperative.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the purpose of the Fuel Jettison System?

A

To manage fuel levels by jettisoning fuel.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does the FUEL JETTISON NOZZLE control?

A

It controls the fuel jettison operation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What does the term ‘ARMED’ signify in the context of the fuel jettison system?

A

The jettison system is ready to operate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Fill in the blank: The Fuel Jettison System should not be activated at _______.

A

FLAPS 30

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

True or False: The Fuel Jettison System can be activated while in the ‘DO NOT JETT AT FLAPS 30’ state.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What happens when the Fuel Jettison NOZZLE Switch is ON?

A

The jettison nozzle valve is selected open in flight and opens main tank defuel/isolation valves and center tank jettison isolation valves if jettison is armed.

This is a critical function for managing fuel during flight.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What does it indicate when the Fuel Jettison Nozzle VALVE Lights are illuminated (amber)?

A

The jettison nozzle valve is not in the selected position.

This alerts the crew to a potential issue with the fuel jettison system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What does the Fuel Jettison ARM Switch do when ARMED?

A

It arms the jettison system and initializes fuel-to-remain at the MLW fuel quantity.

This is essential for ensuring safe landing conditions.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What occurs when the Fuel Jettison ARM Switch is OFF?

A

It disarms the jettison system.

This indicates that the jettison operation cannot proceed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What does it mean when the Fuel Jettison FAULT Light is illuminated (amber)?

A

A system fault has occurred and fuel jettison is inoperative.

Immediate attention is required to resolve the fault.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What is the function of the FUEL TO REMAIN Selector when PULL ON?
It changes the mode from MLW (maximum landing weight) to MAN (manual). ## Footnote This allows for manual adjustment of fuel levels.
26
How does rotating the FUEL TO REMAIN Selector clockwise affect the fuel quantity?
It increases the MANUAL fuel-to-remain quantity. ## Footnote Precise control over fuel management is critical during flight.
27
What happens when the FUEL TO REMAIN Selector is rotated counterclockwise?
It decreases the MANUAL fuel-to-remain quantity. ## Footnote This allows the crew to adjust fuel levels as needed.
28
What does pushing the FUEL TO REMAIN Selector do?
Automatically selects the MLW fuel-to-remain quantity. ## Footnote This ensures that the aircraft maintains the necessary fuel for safe landing.
29
What conditions trigger the expanded FUEL QTY display?
The expanded FUEL QTY display appears for the following conditions: * crossfeed valve open * one or more fuel tank quantity indications are inoperative * the FUEL IN CENTER alert message is displayed * the FUEL QTY LOW alert message is displayed * the FUEL LOW CENTER alert message is displayed * the FUEL FLOW ENG alert message is displayed * the INSUFFICIENT FUEL alert message is displayed * the FUEL IMBALANCE alert message is displayed * the airplane is on the ground and both engine(s) off * the balance system is active * the balance system is selected on and fuel is already balanced ## Footnote None
30
What indicates a fuel imbalance on the expanded fuel quantity display?
A fuel imbalance pointer is displayed next to the low tank quantity for the following conditions: * Solid amber pointer: FUEL IMBALANCE message displayed * Solid white pointer: FUEL IMBALANCE message not displayed, main tank fuel differs by more than 100 kilograms, and either crossfeed valve is open or balance system is ON ## Footnote None
31
What happens when fuel is back in balance within 100 kilograms?
When fuel is back in balance within 100 kilograms and the crossfeed valve is open or the balance system is ON, FUEL BALANCED replaces FUEL QTY on the expanded fuel quantity display and flashes for 5 seconds. ## Footnote None
32
True or False: A solid amber fuel imbalance pointer indicates that the FUEL IMBALANCE message is not displayed.
False ## Footnote A solid amber pointer indicates that the FUEL IMBALANCE message is displayed.
33
What is the significance of the pointer flashing in the context of fuel balance?
The pointer flashes if fuel balance or crossfeed is going in the wrong direction. ## Footnote None
34
Fill in the blank: The difference in fuel quantity which causes the FUEL IMBALANCE message to be displayed varies with total _______.
[main tank fuel quantity] ## Footnote None
35
What does the fuel jettison indication display when ARMED?
The fuel quantity that leaves the airplane at maximum landing weight (MLW) when jettison is complete ## Footnote This ensures the aircraft can land safely after fuel jettisoning.
36
What happens to the fuel temperature and static air temperature displays when fuel jettison is ARMED?
They are replaced by the fuel to remain display ## Footnote This change is part of the fuel jettison system's operational protocol.
37
What does the fuel to remain MAN (manual) selection indicate?
The fuel jettison system is ARMED and the FUEL TO REMAIN selector is pulled on ## Footnote This allows the pilot to manually adjust the fuel quantity to remain.
38
How can the quantity of fuel to remain be changed?
By rotating the FUEL TO REMAIN selector ## Footnote This provides flexibility in managing fuel levels during jettison.
39
How is the fuel synoptic display accessed?
By pushing the systems (SYS) display switch and selecting the FUEL synoptic key ## Footnote Refer to Display Select Panel in Chapter 10, Section 10 for additional details.
40
What do the fuel flow bars indicate?
They represent a configuration of valve positions, switch positions, and pump status ## Footnote Actual fuel flow is not sensed or displayed.
41
Is actual fuel flow sensed or displayed in the fuel system?
False ## Footnote Fuel flow bars do not represent actual system operation.
42
What is the total fuel quantity displayed?
23.2 KGS X 1000 ## Footnote This figure represents the total fuel available for the aircraft.
43
What is indicated when the FUEL TO REMAIN selector is pulled on?
The fuel jettison system is ARMED ## Footnote This action is crucial for initiating the jettison process.
44
Fill in the blank: The fuel jettison indications display the fuel quantity that leaves the airplane at _______.
maximum landing weight (MLW) ## Footnote This is vital for ensuring safe landing conditions.
45
What type of information does the fuel synoptic display provide?
Information regarding fuel flow bars based on valve positions, switch positions, and pump status ## Footnote It is essential for monitoring the fuel system's configuration.
46
What does a white fuel valve symbol indicate?
Fuel valve is closed. ## Footnote Indicates that the valve is not allowing fuel to flow.
47
What does a green fuel valve symbol indicate?
Fuel valve is in transit or open. ## Footnote Green indicates either the valve is moving to an open position or is already open.
48
What does an amber fuel valve symbol with a crossout indicate?
Fuel valve is failed; commanded open but remains closed or commanded closed but remains open. ## Footnote This indicates a malfunction in the valve operation.
49
What does a gray fuel valve symbol indicate?
Fuel valve state is invalid. ## Footnote This suggests that the system cannot determine the status of the valve.
50
What is displayed in the Fuel Synoptic Display?
Fuel Synoptic Indications. ## Footnote This display shows the operational status of the fuel valves.
51
What does the amber fuel valve symbol indicate when it is commanded open?
Valve is failed; remains closed. ## Footnote This indicates an issue where the valve should be open but is not functioning correctly.
52
What does the amber fuel valve symbol indicate when it is commanded closed?
Valve is failed; remains open or in transit. ## Footnote This indicates a malfunction where the valve should be closed but is not.
53
What does a white fuel valve symbol indicate?
Fuel valve is closed. ## Footnote Indicates that the valve is not allowing fuel to flow.
54
What does a green fuel valve symbol indicate?
Fuel valve is in transit or open. ## Footnote Green indicates either the valve is moving to an open position or is already open.
55
What does an amber fuel valve symbol with a crossout indicate?
Fuel valve is failed; commanded open but remains closed or commanded closed but remains open. ## Footnote This indicates a malfunction in the valve operation.
56
What does a gray fuel valve symbol indicate?
Fuel valve state is invalid. ## Footnote This suggests that the system cannot determine the status of the valve.
57
What is displayed in the Fuel Synoptic Display?
Fuel Synoptic Indications. ## Footnote This display shows the operational status of the fuel valves.
58
What does the amber fuel valve symbol indicate when it is commanded open?
Valve is failed; remains closed. ## Footnote This indicates an issue where the valve should be open but is not functioning correctly.
59
What does the amber fuel valve symbol indicate when it is commanded closed?
Valve is failed; remains open or in transit. ## Footnote This indicates a malfunction where the valve should be closed but is not.
60
What indicates that the fuel pump switch is ON?
Fuel Pump (green rectangle) ## Footnote This indicates that the fuel pump is actively engaged.
61
What does a fuel pump switch ON with a pressure sensor detecting pressure greater than 7 to 8 psig indicate?
Fuel Pump (green rectangle with line) ## Footnote This indicates that the fuel pump is operating normally and providing sufficient pressure.
62
What does a white rectangle for the fuel pump indicate?
Fuel pump switch is OFF ## Footnote This shows that the fuel pump is not operational.
63
What does the amber rectangle with a crossout signify for the fuel pump?
Fuel pump failed or pressure sensor detects pressure less than 7 to 8 psig ## Footnote This indicates a critical failure or insufficient pressure.
64
What is indicated by a gray rectangle for the fuel pump?
Fuel pump state is invalid ## Footnote This suggests that the system cannot determine the status of the fuel pump.
65
What does the green indication for Normal Fuel Feed represent?
Fuel line is pressurized; pressure sensor detects pressure greater than 7 to 8 psig ## Footnote This indicates that fuel is being properly supplied to the system.
66
What does it mean when the fuel pump has been load shed?
Fuel Pump load shed (white) ## Footnote Indicates that the fuel pump is ON but has been limited in function due to system constraints.
67
What does the amber indication in the fuel synoptic display signify?
Suction feed; fuel line is unpressurized and suction flow is occurring. ## Footnote This indicates that the fuel system is experiencing a condition where the fuel is being drawn from the tank without pressure.
68
What does a white indication represent in the total fuel display?
Normal indication. ## Footnote This indicates that the total fuel quantity is within acceptable limits.
69
What does the 'FUEL QTY LOW' message indicate?
Fuel tank quantity is low. ## Footnote This alert is triggered when the fuel quantity in the tank falls below a predefined threshold.
70
What does a blank tank quantity indicate?
Invalid indication or any individual tank quantity blank. ## Footnote This could point to a malfunction in the fuel measurement system or a communication error.
71
What alert message is displayed when fuel is insufficient?
INSUFFICIENT FUEL alert message is displayed. ## Footnote This alert warns the crew that the fuel levels are critically low and may affect flight operations.
72
What is indicated by an amber main tank quantity display?
Fuel tank quantity is low. ## Footnote This alert serves as a warning that the fuel levels are approaching the minimum required for safe operation.
73
Fill in the blank: The total fuel quantity is represented in _______.
[white] ## Footnote This indicates that the total fuel quantity is being monitored and is within the normal range.
74
What does the 'TOTAL' label signify in the fuel synoptic display?
Indicates the total amount of fuel available in the aircraft. ## Footnote This includes the sum of fuel from all tanks and is critical for flight planning.
75
What does the term 'suction feed' refer to in the context of the fuel system?
A condition where the fuel line is unpressurized and fuel is drawn by suction. ## Footnote This system is important for ensuring fuel is available to the engines under various operational conditions.
76
True or False: A blank indication in the tank quantity means the fuel tank is full.
False ## Footnote A blank indication typically represents an invalid reading rather than a full tank.
77
What color indicates normal indication for Center Tank Quantity?
White
78
What message is displayed when the Center Tank Quantity reaches 149.0 and the indication is amber?
FUEL IN CENTER
79
What does the FUEL LOW CENTER message indicate?
Center fuel tank quantity is low
80
What does the amber pointer signify in terms of fuel imbalance?
FUEL IMBALANCE is displayed
81
What does the white pointer indicate regarding the crossfeed switch?
The crossfeed switch is ON or the balance switch is ON and the main tank quantities differ by more than 200 lbs (or 100 kgs)
82
What does a balanced indication in fuel display represent?
Flashes once fuel is within 200 lbs (or 100 kgs) of balanced
83
What is the normal indication for Minimum Fuel Temperature?
Temperature displayed white
84
Fill in the blank: Minimum Fuel Temperature is the Fuel Freeze Temperature plus _______.
3 degrees
85
What is the function of the fuel system in the B787?
The fuel system supplies fuel to the engines and the APU.
86
Where is fuel contained in the B787?
Fuel is contained in a center tank, and left and right main tanks.
87
How is fuel quantity measured in the B787?
Fuel quantity is measured by sensors in each tank.
88
Where is the total fuel quantity displayed in the B787?
Total fuel quantity is displayed on the primary EICAS display.
89
What additional information is displayed on the FUEL synoptic display?
Tank quantities and total fuel quantity.
90
What happens to expanded fuel indications in non-normal conditions?
Expanded fuel indications showing the left main, center, and right main tank quantities are displayed.
91
What does a blank display indicate for fuel temperature?
Invalid indication.
92
What does white fuel temperature indicate?
Normal indication; the lowest of three tank temperatures.
93
What does amber fuel temperature indicate when no '-' is displayed?
High fuel temperature indication.
94
What does amber fuel temperature indicate when '-' is displayed?
Low fuel temperature indication.
95
What is the significance of the MEN FUEL TEMP display?
It indicates invalid temperature indication when displayed as blank.
96
Fill in the blank: The fuel system includes the _______ tank.
center
97
True or False: The fuel temperature is displayed in three colors.
True
98
How is fuel quantity measured in the B787?
By sensors in each tank ## Footnote Total fuel quantity is displayed on the primary EICAS display and tank quantities on the FUEL synoptic display.
99
What happens to fuel quantity indications during high pitch maneuvers?
They can fluctuate significantly ## Footnote This is especially true during takeoff and go-around, particularly at low fuel loads.
100
What color is the fuel temperature displayed in under normal conditions?
White ## Footnote It turns amber when it approaches maximum or freeze temperatures.
101
What do the fuel pumps in each tank provide?
Sufficient fuel to operate one engine under all conditions ## Footnote Each tank contains two AC-powered fuel pumps.
102
What are the center tank fuel pumps used for?
Override/jettison pumps ## Footnote They have a higher output pressure than the left and right main tank fuel pumps.
103
What happens when the main tank fuel pump switches are off?
PRESS lights illuminate and EICAS advisory messages display ## Footnote Messages indicate which fuel pump is affected (L, R, FWD, or AFT).
104
What does it mean if a fuel pump is labeled LOAD SHED?
The pump has been load shed due to insufficient electrical power ## Footnote Indications include the pump switch PRESS light being illuminated.
105
What type of fuel pump is in the left main tank?
DC-powered fuel pump ## Footnote It operates automatically to provide fuel to the APU when AC power is not available.
106
What is the purpose of surge tanks in the B787?
To drain fuel into the main tanks ## Footnote They are provided in each wing, outboard of each main tank.
107
Before engine start, what should be done with the main tank pump switches?
They should all be pushed ON ## Footnote If the FUEL IN CENTER message is displayed, the center tank pump switches should also be ON.
108
What should be done with the main tank pump switches before start?
All main tank pump switches should be pushed ON.
109
What action is required if the FUEL IN CENTER message is displayed?
The center tank pump switches should also be pushed ON.
110
When should the center tank pump switches be pushed off during flight?
When the FUEL LOW CENTER message displays.
111
What happens if a center pump has low output pressure?
The fuel pump switch PRESS light illuminates and the message FUEL PUMP CENTER (L or R) displays.
112
What is the purpose of the scavenge system?
To transfer any remaining center tank fuel to the main tanks.
113
When does fuel transfer from the center tank to the main tanks begin?
When either main tank quantity is less than approximately 16,000 kilograms and the center tank pumps are off.
114
What inhibits the fuel transfer system?
If the engine is on suction feed.
115
What is suction feed?
A method where each engine can draw fuel from its corresponding main tank through a suction feed line that bypasses the pumps.
116
What may happen as the airplane climbs regarding dissolved air?
Dissolved air is released from the fuel, which may collect in the suction feed line and restrict fuel flow.
117
What can occur at high altitude due to fuel flow reduction?
Thrust deterioration or engine flameout.
118
What happens to dissolved air in the fuel tank at cruise altitude?
It eventually depletes.
119
How can fuel pressure be provided to both engines?
By opening the fuel crossfeed valve.
120
What is the effect of continued crossfeed use?
It results in a progressive fuel imbalance.
121
What is the normal position of the crossfeed valve during operations?
Closed.
122
What indicates a disagreement between the crossfeed valve position and switch position?
The CROSSFEED switch VALVE light illuminates and the EICAS advisory message FUEL CROSSFEED displays.
123
What is the purpose of the fuel balance system?
To transfer fuel from main tank to main tank.
124
How is fuel transfer initiated in the fuel balance system?
By pushing the fuel balance switch ON.
125
What happens when fuel is balanced during the transfer process?
Transfer stops automatically.
126
What occurs if the fuel balance system fails to achieve balance?
The system shuts down, the BALANCE switch FAULT light illuminates, and the EICAS advisory message FUEL BALANCE SYS is displayed.
127
What inhibits fuel balance operation?
Refueling, defueling, and ground transfer of fuel.
128
What inhibits fuel balance operation?
Fuel balance operation is inhibited for reasons such as: * Refueling * Defueling * Ground transfer of fuel * Fuel balance system failure * Center tank pump is on * Engines running on the ground * Fuel jettison system active in flight * FUEL DISAGREE or FUEL QTY LOW message displayed ## Footnote These conditions prevent the fuel balance system from functioning to ensure safety and operational integrity.
129
What EICAS alert message displays when there is a fuel imbalance?
FUEL IMBALANCE ## Footnote This alert indicates that the fuel quantity in left and right main tanks differs by a predetermined quantity.
130
How is fuel balancing accomplished?
Fuel balancing is accomplished using: * Fuel balance system * Manual crossfeed ## Footnote The choice between these methods depends on the situation and phase of flight.
131
What is the process to initiate manual crossfeed?
Manual crossfeed is initiated by: * Opening the crossfeed valve * Turning off the fuel pump switches for the tank with lower quantity ## Footnote Manual crossfeed can be performed in any phase of flight.
132
When can the fuel balance system be initiated?
The fuel balance system can be initiated by pushing the fuel balance switch in any phase of flight, including on the ground if the engines are shutdown and the APU is running ## Footnote This flexibility allows for effective fuel management during various operational states.
133
Fill in the blank: The fuel balance system is used when the _______ is running.
APU ## Footnote The APU must be running for the fuel balance system to be used on the ground with shutdown engines.
134
List the fuel tank locations mentioned.
Fuel tank locations include: * Surge Tank * Main Tank ## Footnote Understanding the locations of fuel tanks is crucial for managing fuel distribution and balance.
135
What is the fuel capacity of the Left Main tank in liters?
20,895 liters ## Footnote This refers to the usable fuel capacity at level attitude.
136
What is the fuel capacity of the Right Main tank in kilograms?
16,776 kilograms ## Footnote This is the usable fuel capacity at level attitude.
137
What is the total fuel capacity of the B787 in liters?
126,356 liters ## Footnote This total includes the capacities of all fuel tanks.
138
What is the fuel capacity of the Center tank in kilograms?
67,889 kilograms ## Footnote This is the usable fuel capacity at level attitude.
139
What is the total fuel capacity of the B787 in kilograms?
101,451 kilograms ## Footnote This total includes the capacities of all fuel tanks.
140
Fill in the blank: The usable fuel density is _______ kg per liter.
0.8029 kg per liter
141
What components are included in the B787 fuel system schematic?
L PUMPS, R PUMPS, CENTER PUMPS, FUEL CROSSFEED, BALANCE ## Footnote These components manage the distribution and transfer of fuel among tanks.
142
True or False: The fuel tank capacities of the Left Main and Right Main tanks are the same.
True
143
What is the total usable fuel capacity of the B787 in liters and kilograms?
126,356 liters and 101,451 kilograms ## Footnote These values represent the total fuel capacity across all tanks.
144
From where is APU fuel supplied?
APU fuel is supplied from the left fuel manifold ## Footnote APU fuel can be provided by any AC fuel pump supplying fuel to the left fuel manifold or by the left main tank DC fuel pump.
145
What happens to the DC pump when the APU switch is ON and no AC power is available?
The DC pump runs automatically ## Footnote With AC power available, the left aft AC fuel pump operates automatically, regardless of fuel pump switch position, and the DC fuel pump turns off.
146
How is fuel jettison accomplished?
By opening the center tank jettison isolation valves and the main tank defuel/isolation valves ## Footnote Fuel flows into the jettison/refuel manifold and is then jettisoned overboard through jettison nozzle valves inboard of each aileron.
147
What is the first step to initiate fuel jettison?
Pushing the FUEL JETTISON ARM switch to select ARMED ## Footnote The jettison system automatically sets the fuel-to-remain to the maximum landing weight (MLW) fuel quantity.
148
What replaces fuel temperature on the EICAS display during jettison?
TO REMAIN quantity ## Footnote The TO REMAIN quantity can be manually adjusted using the TO REMAIN selector.
149
What happens when the FUEL JETTISON ARM switch is armed and either fuel jettison NOZZLE switch is pushed ON in flight?
The defuel/isolation valves and jettison isolation valves open ## Footnote The fuel system automatically positions the valves as required to jettison fuel based on the selected TO REMAIN quantity.
150
Can the nozzles open on the ground?
No, the nozzles cannot open on the ground ## Footnote This restriction applies regardless of switch positions.
151
What is displayed on the fuel synoptic when jettisoning fuel in flight?
Jettison time in minutes ## Footnote This display occurs when the jettison arm switch is positioned on while in the air.
152
When does the fuel jettison automatically stop?
When a value just above the FUEL TO REMAIN quantity is reached ## Footnote The system then closes the defuel/isolation valves and the jettison isolation valves.
153
How much fuel must remain in each main tank after jettison is complete?
At least 3900 kilograms of fuel ## Footnote This requirement ensures safety and operational integrity.
154
What is the purpose of the Nitrogen Generation System (NGS) in the B787?
Provides automatic full-time flammability protection for the fuel system by generating nitrogen enriched air to displace fuel vapors in all fuel tanks.
155
How does the Nitrogen Generation System (NGS) enhance safety during flight operations?
Minimizes fuel flammability during normal flight and ground operations.
156
What EICAS message may indicate insufficient fuel in the B787?
INSUFFICIENT FUEL
157
What conditions trigger the 'FUEL AUTO JETTISON' EICAS message?
Occurs when the total fuel quantity is less than the FUEL TO REMAIN and a jettison nozzle valve is open or the fuel jettison automatic shutoff has failed.
158
What does the 'FUEL BALANCE ON' EICAS message indicate?
The fuel balance function is active.
159
What does the 'FUEL BALANCE SYS' EICAS message indicate?
The fuel balance system has failed.
160
Fill in the blank: The Nitrogen Generation System generates _______ enriched air.
nitrogen
161
True or False: The Nitrogen Generation System operates only during flight.
False
162
List the EICAS messages related to fuel management.
* INSUFFICIENT FUEL * FUEL AUTO JETTISON * FUEL BALANCE ON * FUEL BALANCE SYS
163
What chapter in the documentation discusses 'Fuel Monitoring'?
Chapter 11, Section 32
164
What chapter details EICAS Messages?
Chapter 11, Section 60

787 (39 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions