PSA KV Exam Guide 2023 with complete solution
When you add power, is the charger message good or bad?
good!
If the "Auto Transfer Fail" light comes on, is it a good thing or a bad thing?
Good thing. This prevents a good generator from trying to power a bad bus, and then
shorting itself out
when will the fault light up in the IDG light?
The IDG will automatically disconnect when an over temperature or over torque
condition occurs. If the IDG oil overheats or oil pressure drops below limits, the IDG
switchlight will Lamp/caution message
Pressing the IDG disconnect switch will do what?
Disconnect the IDG from the engine gearbox in the event of a malfunction within the
drive unit
What is the AC bus 1 Generator Priority?
IDG 1, APU, IDG2, Ground power
What is the AC bus 2 Generator Priority?
IDG 2, APU, IDG 1, Ground Power
How is the DC Emergency Bus Powered?
APU & Main Battery Busses
What does the DC Emergency Bus Power?
L/R Engine Squibs, APU Squibs A&B, Fuel Shutoff Valves, Hydraulic Shutoff Valves
When is the DC emergency bus displayed on the DC synoptic page?
Only when it is not powered or when its faulted.
How many TRU's (Transformer rectifying unit) in a 7/900
4
What are the TRU's ratings?
7/900: 120 Amps
What do the TRU's do?
For devices requiring DC power, 115 volt AC power is converted into unregulated 28
volt dc power by the TRU's (Transformer Rectifying Unit)
When will the ADG automatically deploy?
In the event of a total AC power loss while in flight
when the ADG is deployed what busses are powered?
ADG and Essential Busses
Which HYD system is powered by the ADG?
3B Regardless of switch position
How many batteries are there, and is one bigger than the other?
Two.
Main battery is 17 Amps, 24 volts
APU battery is 43 Amps, 24 volts
How many fire bottles are in the cargo compartment(s)?
Two
What is the difference between the 2 fire bottles in the cargo compartment?
One is a fast release bottle, one is a slow release bottle.
How long does it take for the slow release bottle to dispense in the 7/9?
,The slow bottle expels all the retardant in 60 mins.
What limitation does the slow fire bottle discharge rate create?
7/900: must be within 60 mins of a suitable airport with cargo in the cargo compartment
How many smoke detectors are installed in the cargo compartments?
7/900 - FWD 3, AFT 2
What is a good FFD test (7/900)
Master warning
All pushlights (fire) illuminate
All bottles Illuminate
Cargo lights illuminate
Fire sys ok green message
How many fire bottles does the APU have?
one
Can the APU bottle be fired into the engine?
No
Do we have fire detection in the cargo compartment?
No, Smoke only
Hoe many fire bottles do the engines have?
two
Once both engine bottles have been fired, is there fire protection for the other
engine?
no
Why do we have a gravity cross flow system?
allows for the balancing of fuel when the powered crossflow is not operating (QRH
Driven)
On the 7/900, how does the APU get its fuel?
From an isolated pump that pulls fuel from the LEFT COLLECTOR TANK
At what point will the fuel from the center tank begin to transfer to the wings?
When the wing tanks reach 93% (7/900) of their capacity fuel is transferred. At 100%
the transfer stops until the wing capacity reaches 93 or 94% again. This cycle continues
until the center tank is empty.
Which bleed air stage is used for pressurization in the 7/900?
6th
in the 7/900 is the aircraft using 10th and 6th stage bleed air at the same time or
one at a time?
10th stage supplements the 6th stage when the aircraft is at low power settings and the
pressure less than 13 psi
If the starter does not cut out, what is the procedure for removing bleed air?
Review QRH (but its just hit the stop button, I think)
Can we start the APU while we are being fueled?
no
On the ground, the APU will shut down for HOTLOP (High Oil Pressure Low Oil
Temperature) - Is that true for when the APU is running in flight?
No
What does the green AVAIL light indicate?
7/900 Ready for Electrical Loading
, Give Four reasons why the APU will Automatically shut down
ON GROUND OR IN FLIGHT
Fire
Overspeed; RPM 107+
ECU Failure
DC Power Loss
Loss of RPM Signal
Slow start
ON GROUND / 60 SECONDS POST LANDING
High oil temp
low oil press
intake door signal loss
electrical short
ON GROUND/APU BLEED UNAVAILABLE & 60 SECONDS POST LANDING
Loss of EGT Signal
When you identify a HOT START, what is the procedure that you will use to safely
secure the engine?
TIMS
Thrust lever shutoff
Ignition off (200)
Motor starter
Stop button
During a normal engine start, how many ignition systems do we normally use?
one
Do we have control over which ignition is used on the 7/900?
No
Does the CONTINUOUS IGNITION ever come on automatically?
yes, approach to stall
At what percentage does the starter cut out?
7/900 - 50% N2
Are the thrust reversers hydraulic or pneumatic?
7/900: Hydraulic
What kind of thrust do i get when the 7/900 thrust levers are placed into the MAX
POWER detent?
Max power detent gives APR Thrust
How long can the 7/900 stay in TOGA thrust?
5 Min
How long can the 7/900 stay in APR Thrust?
10 min
Which detent is used to provide MAX CONTINUOUS thrust during single engine
operations?
CLIMB
In the 700/900 what happens if the fuel is introduced above 120 degrees ITT?
The FADEC will abort the start
How can the Hydraulic Shutoff valves be closed?
7/900: engine fire pushlights or HYD SOV pushlights
When you add power, is the charger message good or bad?
good!
If the "Auto Transfer Fail" light comes on, is it a good thing or a bad thing?
Good thing. This prevents a good generator from trying to power a bad bus, and then
shorting itself out
when will the fault light up in the IDG light?
The IDG will automatically disconnect when an over temperature or over torque
condition occurs. If the IDG oil overheats or oil pressure drops below limits, the IDG
switchlight will Lamp/caution message
Pressing the IDG disconnect switch will do what?
Disconnect the IDG from the engine gearbox in the event of a malfunction within the
drive unit
What is the AC bus 1 Generator Priority?
IDG 1, APU, IDG2, Ground power
What is the AC bus 2 Generator Priority?
IDG 2, APU, IDG 1, Ground Power
How is the DC Emergency Bus Powered?
APU & Main Battery Busses
What does the DC Emergency Bus Power?
L/R Engine Squibs, APU Squibs A&B, Fuel Shutoff Valves, Hydraulic Shutoff Valves
When is the DC emergency bus displayed on the DC synoptic page?
Only when it is not powered or when its faulted.
How many TRU's (Transformer rectifying unit) in a 7/900
4
What are the TRU's ratings?
7/900: 120 Amps
What do the TRU's do?
For devices requiring DC power, 115 volt AC power is converted into unregulated 28
volt dc power by the TRU's (Transformer Rectifying Unit)
When will the ADG automatically deploy?
In the event of a total AC power loss while in flight
when the ADG is deployed what busses are powered?
ADG and Essential Busses
Which HYD system is powered by the ADG?
3B Regardless of switch position
How many batteries are there, and is one bigger than the other?
Two.
Main battery is 17 Amps, 24 volts
APU battery is 43 Amps, 24 volts
How many fire bottles are in the cargo compartment(s)?
Two
What is the difference between the 2 fire bottles in the cargo compartment?
One is a fast release bottle, one is a slow release bottle.
How long does it take for the slow release bottle to dispense in the 7/9?
,The slow bottle expels all the retardant in 60 mins.
What limitation does the slow fire bottle discharge rate create?
7/900: must be within 60 mins of a suitable airport with cargo in the cargo compartment
How many smoke detectors are installed in the cargo compartments?
7/900 - FWD 3, AFT 2
What is a good FFD test (7/900)
Master warning
All pushlights (fire) illuminate
All bottles Illuminate
Cargo lights illuminate
Fire sys ok green message
How many fire bottles does the APU have?
one
Can the APU bottle be fired into the engine?
No
Do we have fire detection in the cargo compartment?
No, Smoke only
Hoe many fire bottles do the engines have?
two
Once both engine bottles have been fired, is there fire protection for the other
engine?
no
Why do we have a gravity cross flow system?
allows for the balancing of fuel when the powered crossflow is not operating (QRH
Driven)
On the 7/900, how does the APU get its fuel?
From an isolated pump that pulls fuel from the LEFT COLLECTOR TANK
At what point will the fuel from the center tank begin to transfer to the wings?
When the wing tanks reach 93% (7/900) of their capacity fuel is transferred. At 100%
the transfer stops until the wing capacity reaches 93 or 94% again. This cycle continues
until the center tank is empty.
Which bleed air stage is used for pressurization in the 7/900?
6th
in the 7/900 is the aircraft using 10th and 6th stage bleed air at the same time or
one at a time?
10th stage supplements the 6th stage when the aircraft is at low power settings and the
pressure less than 13 psi
If the starter does not cut out, what is the procedure for removing bleed air?
Review QRH (but its just hit the stop button, I think)
Can we start the APU while we are being fueled?
no
On the ground, the APU will shut down for HOTLOP (High Oil Pressure Low Oil
Temperature) - Is that true for when the APU is running in flight?
No
What does the green AVAIL light indicate?
7/900 Ready for Electrical Loading
, Give Four reasons why the APU will Automatically shut down
ON GROUND OR IN FLIGHT
Fire
Overspeed; RPM 107+
ECU Failure
DC Power Loss
Loss of RPM Signal
Slow start
ON GROUND / 60 SECONDS POST LANDING
High oil temp
low oil press
intake door signal loss
electrical short
ON GROUND/APU BLEED UNAVAILABLE & 60 SECONDS POST LANDING
Loss of EGT Signal
When you identify a HOT START, what is the procedure that you will use to safely
secure the engine?
TIMS
Thrust lever shutoff
Ignition off (200)
Motor starter
Stop button
During a normal engine start, how many ignition systems do we normally use?
one
Do we have control over which ignition is used on the 7/900?
No
Does the CONTINUOUS IGNITION ever come on automatically?
yes, approach to stall
At what percentage does the starter cut out?
7/900 - 50% N2
Are the thrust reversers hydraulic or pneumatic?
7/900: Hydraulic
What kind of thrust do i get when the 7/900 thrust levers are placed into the MAX
POWER detent?
Max power detent gives APR Thrust
How long can the 7/900 stay in TOGA thrust?
5 Min
How long can the 7/900 stay in APR Thrust?
10 min
Which detent is used to provide MAX CONTINUOUS thrust during single engine
operations?
CLIMB
In the 700/900 what happens if the fuel is introduced above 120 degrees ITT?
The FADEC will abort the start
How can the Hydraulic Shutoff valves be closed?
7/900: engine fire pushlights or HYD SOV pushlights
