Systems-Fire, Electrical, Communications Flashcards
What do you look for during FIREX Monitor test?
6 x “squib ok”
What is the normal pressure of the engine and APU fire bottles?
600-625 psi
What does pushing a “Fire Push” switchlight arm?
The FIREX bottles
Which electrical bus powers the fire protection equipment?
- DC Emergency (extinguishing)
- DC Battery (detection)
What does “ENG SOV” mean if you pushed the engine fire push switch?
The engine SOV failed to close.
Can the fire protection system discriminate between a fire and a short?
Yes
What is the immediate action response to a “MLG BAY OVHT” warning?
- Airspeed 197 kts
- LDG gear lever DN
How many electrical buses are there?
5 AC buses
9 DC buses
What are the five sources of AC POWER?
- GEN 1&2
- APU GEN
- ADG
- Ext power
When will the ADG deploy automatically?
When there is a loss of both generators in flight.
What does the ADG supply AC power to?
- 3B hydraulic pump
- AC ESS bus
What are the sources of 28v DC power?
- External power
- 2 batteries
- TRU’s
Describe the batteries on the CL605
There are two 24v batteries on a 28v DC system to allow for charging. The main battery is 24v 17amp. The APU battery is 24v 43amp.
How are the batteries charged?
The main and APU battery have battery chargers that convert 115v AC to 28v DC.
At what rate do the batteries recharge?
- Main battery = 10amps
- APU battery = 17 amps
What is the purpose of the MAIN BUS TIE switch?
Allows both DC buses to be powered by a single TRU.
When does the electrical logic close the DC solid state contactor on the DC ESS bus?
When the system detects a voltage drop below 17v it connects the DC ESS bus to the APU battery.
Is there an EICAS message for a TRU failure?
No
Which bus is powered when the battery master switch is turned on?
Battery bus
What is the function of the R/T - I/C switch?
Cold or hot mic selection
How would you select 8.33 kHz on the comm radios?
- Double tap active comm line select key (L-1)
- Select R-2 to toggle to 8.33 kHz
- Select L-4 to return
Can you find the freq of a VOR knowing only the ident?
Yes, type the IDENT into the TUNE page on the CDU and press the VOR 1 or 2 line select key.
How do you “SQUAWK IDENT”?
Press IDENT key on the RTU.
How do you tune the other radio from your own RTU?
Use the 1/2 key on the unit to bring the other RTU screen up on yours.
How do you hold another DME freq without changing the active?
- Select “DME H”
- Double tap L-2
- Select L-2 again to box DME
- Tune desired freq
- Select RETURN (L-4)
Pushing all three TUNE INHIBIT buttons does what?
Inhibits tuning and automatically tunes to 121.5
How does the fire detection loop work?
The fire detection loop is a co-axial cable that looks for a decrease in resistance created by an increase in temperature.
What does the ADG power
AC ESS BUS 1
D.C. ESS BUS
