SKYWEST ERJ 175 SYSTEMS
STUDY GUIDE CORRECT 100%
How many halon bottle(s) serve engine fire supression? - ANSWER 2 Total on AC
Pulling the fire handle does what? - ANSWER Closes
-fuel sov
-hydraulic sov
-bleed air sov
-xfeed bleed air valves
Rotating the fire handle does what? - ANSWER Activates the halon bottle A or halon
bottle B for the respective engine
What are the indications of an Engine Fire? - ANSWER ITT guage will display fire
-Triple chime/fire bell
-Fire handle illuminates
In the event of fire protection system component failure what indications will there be? -
ANSWER EICAS caution message will be displayed and fire on that system can no
longer be detected
When extinguishing bottle is discharged, what also many happen? - ANSWER Fire
handle illumination may be lost.
If the EICAS message is still active the fire condition persists
How many halon bottle(s) serve APU fire suppression? And what happens when the fire
extinguishing button is pressed? - ANSWER One.
-APU Fuel SOV closes
-Halon extinguisher discharges
-and the red striped bar on the APU EMER STOP button is turned off
What does pressing the APU EMER STOP button do? - ANSWER -Closes the APU
Fuel SOV
-Shutdowns the APU
-and lights up the APU extin. Button.
-When pressed the bottom half illuminates white
Will the APU automatically shut down for fire? If so, when? - ANSWER Yes. On ground
10 seconds after fire detection.
, APU FADEC will shut down if:
Flight: UFO
Ground: UFO/SHELF
Underspeed
FADEC Fault
Overspeed
Sensor Fail
High Oil Temp
EGT High Temp
Low Oil Temp
Fire
Anytime 1 minute has gone by since detection and the APU Emer Stop button hasn't
been pressed the APU extinguish light will come on.
--------------
No. In flight
Underspeed
FADEC Fault
Overspeed
Can the AC STBY BUS start the engine? - ANSWER Yes. It is powered from a DC Bus
and Inverter which allows for engine start with no AC power.
When Battery 1 is switched on what happens? What about Battery 2 to AUTO? -
ANSWER Battery 1 ON supplies power to the DC BUS 1 and the Hot Battery Bus.
Battery 2 automatically powers EITHER DC BUS 2 OR APU Start Bus
Sources of AC power include... - ANSWER 2 IDGs, APU, GPU, RAT, Inverter
What considerations are there when disconnecting an IDG? - ANSWER Mechanically
disconnects IDG from gear box and switch must be held in 1-3 seconds. A reset by Mx
is required when disconnecting IDG
What does the amber light on the IDG panel indicate? - ANSWER System senses low
oil pressure or high oil temperature. EICAS message will display
What do the AC Bus Ties do? What happens when the switch is turned to 1 OPEN or 2
OPEN? - ANSWER Connects the Bus 1 and 2 in case a bus fails the system can still be
powered. Opes the Bus Tie Contactor (BTC) segregating the BUS from the other BUS
STUDY GUIDE CORRECT 100%
How many halon bottle(s) serve engine fire supression? - ANSWER 2 Total on AC
Pulling the fire handle does what? - ANSWER Closes
-fuel sov
-hydraulic sov
-bleed air sov
-xfeed bleed air valves
Rotating the fire handle does what? - ANSWER Activates the halon bottle A or halon
bottle B for the respective engine
What are the indications of an Engine Fire? - ANSWER ITT guage will display fire
-Triple chime/fire bell
-Fire handle illuminates
In the event of fire protection system component failure what indications will there be? -
ANSWER EICAS caution message will be displayed and fire on that system can no
longer be detected
When extinguishing bottle is discharged, what also many happen? - ANSWER Fire
handle illumination may be lost.
If the EICAS message is still active the fire condition persists
How many halon bottle(s) serve APU fire suppression? And what happens when the fire
extinguishing button is pressed? - ANSWER One.
-APU Fuel SOV closes
-Halon extinguisher discharges
-and the red striped bar on the APU EMER STOP button is turned off
What does pressing the APU EMER STOP button do? - ANSWER -Closes the APU
Fuel SOV
-Shutdowns the APU
-and lights up the APU extin. Button.
-When pressed the bottom half illuminates white
Will the APU automatically shut down for fire? If so, when? - ANSWER Yes. On ground
10 seconds after fire detection.
, APU FADEC will shut down if:
Flight: UFO
Ground: UFO/SHELF
Underspeed
FADEC Fault
Overspeed
Sensor Fail
High Oil Temp
EGT High Temp
Low Oil Temp
Fire
Anytime 1 minute has gone by since detection and the APU Emer Stop button hasn't
been pressed the APU extinguish light will come on.
--------------
No. In flight
Underspeed
FADEC Fault
Overspeed
Can the AC STBY BUS start the engine? - ANSWER Yes. It is powered from a DC Bus
and Inverter which allows for engine start with no AC power.
When Battery 1 is switched on what happens? What about Battery 2 to AUTO? -
ANSWER Battery 1 ON supplies power to the DC BUS 1 and the Hot Battery Bus.
Battery 2 automatically powers EITHER DC BUS 2 OR APU Start Bus
Sources of AC power include... - ANSWER 2 IDGs, APU, GPU, RAT, Inverter
What considerations are there when disconnecting an IDG? - ANSWER Mechanically
disconnects IDG from gear box and switch must be held in 1-3 seconds. A reset by Mx
is required when disconnecting IDG
What does the amber light on the IDG panel indicate? - ANSWER System senses low
oil pressure or high oil temperature. EICAS message will display
What do the AC Bus Ties do? What happens when the switch is turned to 1 OPEN or 2
OPEN? - ANSWER Connects the Bus 1 and 2 in case a bus fails the system can still be
powered. Opes the Bus Tie Contactor (BTC) segregating the BUS from the other BUS
