Systems 3 Flashcards
Following an engine bleed overheat, will the engine bleed valve need to be closed manually or will this be an automatic
protection?
The engine bleed valve will automatically close
6-2-10 (20)
How many temperature zones on the passenger and freighter types are there?
PAX = 4 zones. Flight deck plus 3 cabin zones F = 3 zones. Flight deck plus 2 cabin zones
Will there be an increase or decrease in fuel flow when the recirculation fans are operative?
The recirculation fans circulate discharged air back into the mix manifold. This allows a reduction in cabin air ventilation, permitting
the packs to operate at a reduced flow. This will result in a decrease in fuel flow
6-2-20 (2)
How do the pack controllers control temperature?
They regulate the pack output air temperature to satisfy the temperature requirement of the compartment requiring the coolest air.
Hot trim air is then added through the trim air valves to control temperature in each of the other compartments
6-2-20 (3)
What temperature will the packs attempt to achieve with the trim air system off?
The packs attempt to maintain all compartments at an average temperature of 24c
6-2-20 (3)
What are the 7 items requiring the use of bleed air?
Air conditioning - Pressurization - Engine start - Wing and engine anti-ice - Center hydraulic system ADP - Hydraulic reservoir pressurization - Thrust reverser actuation 6-2-40 (1)
Can wing anti-ice be operated on the ground?
Wing anti-ice is inhibited on the ground by the air / ground logic system. If a landing is made with the switch ON, the wing anti-ice
valves automatically close at touchdown
6-3-20 (2)
Which flight deck windows have anti-icing and anti-fogging protection?
The forward windows have anti-icing protection and anti-fogging. The side windows have anti-fogging protection only
6-3-20 (4)
Which leading edge slats are provided with bleed air for anti-icing?
The 3 outboard leading edge slats on each wing
6-3-20 (1)
Is ignition provided when engine anti-ice is used?
Selected igniter(s) operate continuously when engine anti-ice is on 6-7-10 (21)
Where is fuel temperature measured?
In the left main tank
6-12-10 (3)
When will the EICAS LOW FUEL caution activate?
When fuel quantity is below 2200lbs in either left or right main tank
6-12-30 (1)
How many fuel pumps are fitted per tank, and what is their power source?
Each fuel tank contains 2 AC driven fuel pumps. The left main tank also contains a DC driven fuel pump for APU feed
6-12-20 (2) 6-12-20 (7)
What are the two types of fuel scavenge systems?
Older aircraft vs. newer aircraft modifications
1) A scavenge system will operate automatically to transfer any unused centre fuel into the main tanks. This begins when the
main tanks are approx. half empty
2) Centre fuel pump power is automatically removed several seconds after CTR FUEL PUMP messages are displayed. It is
installed to ensure continued centre fuel pump operation is terminated
6-12-20 (2)
Is engine operation still possible without the fuel pumps turned on?
Yes. When main tank fuel pressure is low, each engine can draw fuel from it’s corresponding tank through a suction feed line that
bypasses the pumps. However, at high altitude thrust deterioration or engine flameout may occur as a result of the fuel flow reduction
6-12-20 (3)
When will the FUEL CONFIG light illuminate?
When the fuel quantity in left and right main tanks differs by 2000lbs (plus or minus 500lbs) or, when centre fuel pump switched
are off with more than 1200lbs in the centre tank. The FUEL CONFIG light also illuminates when the LOW FUEL caution message
appears because either main tank quantity is below 2200lbs
6-12-20 (4)
What is the purpose of the Nitrogen Generation System (NGS)?
The NGS converts bleed air to nitrogen-enriched air during all phases of flight. The nitrogen-enriched air is delivered to the centre
fuel tank to reduce flammability in the tank
6-12-20 (4)
When installed, at what part of the aircraft is fuel jettisoned from?
Via discharge nozzles inboard of each outboard aileron
6-12-20 (7)
What is the average jettison rate?
Approx. 2600 pounds per minute
6-12-20(7)
Is oil quantity displayed in litres or quarts?
Quarts
6-7-10 (14)
When should the engine start selector release from GND to AUTO during an engine start?
50% N2
6-7-10 (21)
With the engine start selectors in the AUTO mode, when will the selected ignitor(s) continuously operate?
The selected igniter(s) operate continuously with slats extended or engine anti-ice on
6-7-10 (21
Is there a time limit to continuous ignition or flight ignition?
No, there is no time limit
6-7-10 (21)
What is the purpose of selecting FLT on the engine start selectors following a loss of dual engine failure?
FADEC equipped aircraft have auto-relight which will operate BOTH ignitors when N2 drops below idle speed. Non-FADEC
equipped aircraft do not have this feature, so the engine start selectors must be switched to FLT to ensure BOTH ignitors are active.
6-7-10 (21) 6-7-20 (10)
What is the rated thrust of the engine?
The engines are rated at 60,200 pounds of take-off thrust
6-7-20 (1)
When is the red EGT start limit line of 750c displayed when on the ground?
When the fuel control switch is in the cut-off position. It remains displayed when the fuel control switch is moved to run until the
engine is stabilized at idle. (Non – FADEC = 5 seconds after N2 reaches 60%, FADEC = 10 seconds after N2 reaches 60%
6-7-10 (5) 6-7-20 (9)
The in-flight start envelope displays what altitudes?
It displays the closest starting flight level, and two descending flight levels at 2000ft intervals
6-7-10 (7)
Where is the X-BLD indication displayed? What does it mean when it is displayed?
It is indicated above the N2 value. It is displayed when airspeed is lower than that for a windmill start
6-7-10 (8)
In AUTO, when will the standby engine indicator display?
It will display when:
- AC power is lost
- EICAS failed
What 2 commands will positioning the fuel control switch to run during a normal engine start achieve?
1) Opens the engine and spar fuel valves
2) Activates the selected igniters
Approx. what percentage of full rated thrust is achieved by using take-off 1 or take-off 2 thrust?
Each take-off 1 is approx. 90% of maximum rated take-off thrust and each take-off 2 is approx. 80% of maximum rated take-off
thrust
6-7-20 (5)
If take-off 1 thrust is selected for take-off, what climb thrust will be automatically selected?
Climb 1 thrust will automatically be selected. Climb 2 thrust will be automatically selected for a take-off 2 thrust
6-7-20 (6)
Above 10,000ft, de-rated climb thrust will gradually change to reach full climb thrust by what altitude?
300: 12,000ft
300ER / F: 30,000ft
6-7-20 (6)
Can the EEC enter hard mode automatically?
No, ALTN needs to be manually selected on the EEC switch to enter hard mode
6-7-20 (8)
Can the auto-throttle still remain engaged in the EEC hard or soft alternate mode?
Yes, auto-throttle will remain engaged
6-7-20 (8)
Is thrust protection provided during EEC alternate mode?
No, thrust protection is not provided in the alternate mode. Maximum thrust is reached at a thrust lever position of less than full
forward. Thrust overboost can occur at full thrust lever position
6-7-20 (8)
What thrust protections are still available in the EEC alternate mode?
N1 and N2 red line protection is still available in the alternate control mode
6-7-20 (8)
What does the EICAS caution message ENG LIM PROT indicate?
The message ENG LIM PROT is displayed if the thrust lever position is commanding an N1 greater than the maximum rated thrust
N1
6-7-20 (8)
On engine start, what is the meaning of the EICAS message ENG STARTER?
The start valve has failed to open, meaning there will be no bleed air source to the N2 rotor
6-7-20 (9)
On engine start, what is the meaning of the EICAS message STARTER CUTOUT?
The start valve has failed to close automatically at 50% N2 and it will need to be selected manually by placing the engine start
selector to auto
6-7-20 (10)
What is the normal starter duty cycle?
5 minutes on, followed by one half minute off per minute on
6-7-20 (10)
How many attempted APU starts may be made?
The starter duty cycle is a maximum of three consecutive starts or attempts within a 60-minute period
6-7-30 (1)
The bus tie breaker keeps the main AC busses powered at all times by which priority order?
The order of:
- Respective IDG
- APU generator
- Opposite IDG
When is the ground handling bus powered?
It can be powered on the ground only. It is powered automatically whenever APU or external power is provided. External power
has priority over the APU generator. There are no switches for the ground handling bus anywhere on the aircraft.
6-6-20 (5)
What does the ground handling bus power?
It is provided for loads such as cargo handling, maintenance lights, fuelling systems and other equipment that requires power only
during ground operations. Hence, it is not powered in flight.
6-6-20 (4)
When can a tripped circuit breaker be reset?
In flight, it is not recommended to reset tripped circuit breakers unless it is judged to be necessary for flight.
QRH 2-1 (2)
How many attempts may be made at resetting a tripped circuit breaker?
Only one reset may be attempted
QRH 2-1 (2)
What cooling period is required before attempting to reset a tripped circuit breaker?
After a cooling period of approximately 2 minutes
QRH 2-1 (2)
What will happen to the APU if the battery switch is placed to off?
If the battery switch is placed to off, the APU will shutdown. This occurs only on the ground however, and not in flight.
6-7-30 (2)
Is an autoland still available if a generator is lost at below 200ft?
Yes. Below 200ft, a loss of a generator will result in:
- Both bus tie breakers remaining open
- The autopilot with the failed generator is unpowered
- The flight instruments remain powered through the flight instrument transfer busses
- The autoland continues using the 2 remaining autopilots
- There will be no indication appear on the autoland status annunciator
6-6-20 (4)
Is an autoland still available if a generator is lost above 200ft?
Yes. Above 200ft, a loss of a generator will result in:
- Both bus tie breakers closing and the one remaining generator powers both the left and right AC busses
- The left main system powers the centre autopilot
- NO LAND 3 appears on the autoland status annunciator
Can the autoland status annunciation change below 200ft?
Below 200ft, the altitude status annunciation cannot change except to indicate a NO AUTOLND condition. Faults not requiring
crew action or awareness are annunciated after touchdown
6-4-20 (5)
Where does landing altitude barometric pressure correction come from for the pressurization system to work out it’s descent to
touchdown?
Landing altitude barometric pressure correction comes from the captain’s altimeter
6-2-30 (2)
When are EICAS advisories inhibited?
The inhibit period begins from the time either engine is advanced to take-off thrust until the first off:
- 400ft AGL, or
- 20 seconds elapsed time following nose gear extension
6-15-20 (10)
If any illuminated bottle DISCH light is indicated on the fire protection panels, what does this indicate?
It means either the bottle has either discharged, OR has low pressure
6-8-10 (1)
Pulling an engine fire switch achieves 5 things. What are they?
- Closes the engine AND spar fuel valves
- Closes the bleed air valve
- Trips the generator off
- Shuts off hydraulic fluid to the engine driven pump
- Arms both extinguisher bottles
What happens to the recirculation fans when either FWD or AFT cargo fire switch is armed?
Both recirculation fans are turned off. EICAS advisory messages > L / R RECIR FANS will be displayed
6-8-10 (3)
What is the only difference that occurs when arming either of the FWD or AFT cargo fire arm switches?
When arming the AFT cargo firm arm switches, this inhibits high flow operation from the packs. This does not occur when arming the FWD cargo fire arm switch
6-8-10 (4)
What happens when the APU fire switch is pulled?
The following will occur:
- Closes the APU fuel valve
- Closes the APU bleed valve
- Closes the APU inlet door
- Shuts down the APU
- Arms the fire extinguisher bottle
6-8-10 (4)
Does the APU continue to run when an APU fire warning is present?
No, the APU automatically shuts down for a detected fire
6-8-10 (10)
What does the amber FAIL P-RESET light on the fire/overheat test panel indicate?
It indicates a failure of the detectors in one of the following systems:
- Engine fire detection
- Engine overheat detection
- APU fire detection
- Cargo fire detection
6-8-10 (12)
What does pushing the SYS FAIL switch on the fire/overheat test panel achieve?
It extinguishes the FAIL P-RESET light and resets the monitor for other systems
6-8-10 (12)
Can the wheel well fire detection system detect hot brakes?
No, the system will not detect hot brakes without an associated fire
6-8-20 (1)
Is the engine overheat detection system limited to just the engine?
No. Overheat detection is provided in the struts, pneumatic ducts and in the wing and body areas also
6-8-20 (1)
How many engine fire extinguishes are fitted?
There are 2 engine fire extinguisher bottles. Either or both bottles can be discharged into either engine
6-8-20 (2)
How many APU fire extinguisher bottles are fitted?
There is one APU fire extinguisher bottle. The APU fire switch can be rotated either way to discharge the one bottle
6-8-20 (4)
Is main gear fire detection provided by a single or dual loop?
Single loop only
6-8-20 (4)
What cockpit indications are provided to the flight deck for smoke detected in a lavatory?
No indication is provided to the flight deck
6-8-20 (7)
What is the maximum operating speed for the extension and extended operation of the landing gear?
270kts / 0.82M
6-14-10 (2)
What hydraulic system powers the landing gear extension and retraction?
The centre hydraulic system powers the main and nose gear extension and retraction
6-14-20 (1)
How are the nose gear and main gear held in the up and locked position?
nose gear is held up by uplocks. The main gear is held up by the door structure
6-14-20 (2)
How far can the nose wheel be turned by the tiller and the rudder pedals?
The nose wheel can be turned 7 degrees either side using the rudder pedals. Using the tiller will turn the nose wheel 65 degrees.
When both are used at the same time, the tiller overrides the rudder pedal commands
6-14-20 (3)
What does the amber BRAKE SOURCE light indicate?
The amber BRAKE SOURCE light indicates that both normal and alternate brake system pressures are low
6-14-10 (6)
What does the EICAS caution message GEAR DISAGREE indicate?
GEAR DISAGREE displays if any gear is not in the commanded position of the landing gear lever, after the normal transit time
6-14-20 (2)
How is the alternate gear extension provided?
The alternate gear extension system uses a dedicated DC powered electric hydraulic pump to extend the landing gear. Selecting
DN on the alternate gear extend switch releases all door and gear uplocks. The landing gear then free falls to the down and locked
position
6-14-20 (2)
Do the gear doors close after alternate gear extension?
The doors remain open, and the EICAS advisory message GEAR DOORS displays
6-14-20 (3)