B777 SV Study Guide Flashcards
Alternate Action Switch
Two position switch, can be in or out, in is ON and flush, out is OFF
Momentary Action Switch
One position switch spring loaded to out
How many total AC sources of power does the B777 accommodate?
Seven (2 IDG, APU, PRI and SEC external power, 2 BUG)
How many MAIN sources of AC power are on the B777?
Five (2 IDG, APU, PRI and SEC external power)
What does the green AVAIL light indicate on the electrical panel?
Power is available and acceptable
What is ELMS?
Electrical Load Management System, manages load shed priority (galley first, utility bus second, then selected AC components)
How many batteries are on the B777?
2 (Main and APU)
What is the purpose of the APU battery?
Electric start of the APU
The APU can be started by what sources?
Electric and Pneumatic (can be started with ground air)
What does the APU fault light indicate?
Self test or fault in the APU
What does a white message on the EICAS indicate?
Memo
Does the APU have priority over secondary power?
Yes
When will the APU AUTO START message appear?
Dual transfer bus fail
What is the APU max operating altitude for electric?
43,100 ft (service ceiling)
What is the APU max operating altitude for air?
22,000 ft
What does OF indicate next to a fluid level? (Ex: 1.20of)
Overfill
What does RF indicate next to a fluid level? (Ex: 1.00rf)
Refill
What does LO indicate next to a fluid level? (Ex: .45lo)
Low
Are status messages controlling prior to engine start?
Yes
Are status messages controlling after engine start?
No
What happens if you switch off the ADIRU in flight?
Nothing, it stays powered
What happens to the font and background with an oil LO2 message?
Produces a negative font illustration to highlight font (black font on white background)
Can you reset a circuit breaker in flight?
Not recommended, but if the safety of flight dictates, it can be reset once with a two minute cool down
What is TAC?
Thrust Asymmetry Compensation - system kicks in rudder when it senses a minimum of 10% thrust level difference, armed OVER 70 kts
What are the different flight control modes?
Normal, Secondary, Direct
What messages are present in Direct flight control mode?
DISC illuminates on the primary flight computer switch button and PRI FLIGHT COMPUTERS caution on EICAS
Can both backup generators be utilized at the same time?
No, both can run, but only one can be used at a time since they share the same frequency converter
What does DRIVE on the IDG switch or on the synoptic page indicate?
Low oil pressure
What does an X on the IDG on the electrical synoptic page indicate?
Disconnect
Will the IDG disconnect automatically for high temperature?
Yes
How many oxygen masks drop in the supernumerary compartment?
Four in the crew rest compartment, and two in the lavatory (each generator drops a pair)
Which windows have anti-ice and back-up anti-fog?
Forward two
RAT supplies hydraulic pressure to where?
C system flight controls
Does electric power has priority over hydraulic power from the RAT?
No, hydraulic has priority, and if electric is shed, only the CA instrument bus is powered through the main battery
When will the RAT auto-deploy?
Both transfer busses unpowered, all three hydraulic systems low, both engines fail and C hydraulic system low
What is the minimum brake accumulator pressure?
1000 psi (amber band)
Can the parking brake be set with accumulator pressure only?
Yes
What is indicated by the BRAKE SOURCE light?
Both R and C pressure is low
What does the storm switch activate?
Sets the dome, flood and illuminated indicator lights to maximum
How are cargo fires detected?
Optical sensors (except the FSS)
What does the main deck fire suppression switch do?
When ARMED, shuts down the right pack, then the DEPR/DISCH switch depressurizes the deck
How many bottles are activated using the lower cargo fire switches?
5 (2 immediate, 3 delay)
What does the EEC control?
N1
Does the EEC have over-boost protection?
Yes
Is over-boost protection available in ALTN mode?
No
How is soft mode entered by the EEC?
Automatically (NORM and ALTN are displayed in the button switch on the engine control panel)
How is ALTN mode entered by the EEC?
Manually (only ALTN is displayed in the button switch on the engine control panel)
Where are the override fuel pumps located?
Center tank
What pumps must be ON for fuel jettison?
Center pumps (override fuel pumps, fuel will not jettison without these pumps in the ON position)
What is the correct action for a FUEL IN CENTER message?
Turn on the center pumps
What is the correct action for a FUEL LO CENTER message?
Turn off the center pumps
Can you transfer fuel from tank to tank in the B777?
No (only cross-feed engines)
What does the VALVE light indicate in the cross-feed button switch?
The valve is not in the commanded position, or the valve is in transit to the commanded position
With only one AC power source available on the ground, will both center pumps operate?
No, one or both may load shed (both operate only when two power sources are available)
What surfaces is bleed anti-ice delivered to?
3 panels on the wings, and the engine cowls
What constitutes icing conditions?
10 deg or less and visible moisture
How is the equipment cooled if both fans fail?
Cabin differential pressure venting (avoid flying low for long periods due to insufficient cooling ability)
What do the packs do if you turn OFF the recirc fans?
They go to HIGH, increasing fuel burn
Does the temp controller in the supernumerary compartment override the cockpit temp controller for the cabin?
Yes
On the temperature synoptic page, what color is the commanded temperature?
Magenta (white is the actual temperature)