CRJ 200 Panels & Systems Flashcards
TIE 1
Illuminates when DC bus 1 is not powered from its normal source. The service TRU or TRU 2 powers DC bus 1
TIE 2
Illuminates when DC bus 2 is not powered from its normal source. The service TRU or TRU 1 powers DC bus 2
ESS BUS TIE
When pressed in ties the SERV TRU to the DC Essential and Battery Bus during an Essential TRU 2 failure
- ESS TIE can only be selected manually
AC ESS XFER
Illuminated when the AC Essential Bus is not powered by its normal source AC Bus 1 but AC Bus 2
- If AC BUS 1 and 2 are not powered battery is the power source
Air Conditioning - Fault
Illuminates when an over pressure or high temperature has been detected in the pack
Windshield Heat
Low - Applies low heat to 24 degrees
High - Applies high heat to 41 degrees
- Side Windows are heated to 24 degrees
EMERGENCY LIGHTS SWITCH
ON - Turns On all Emergency Lights
OFF - Prevents the emergency lights from illuminating when electing power is loss or off
ARM - Interior and Exterior emergency lights illuminate when DC ESS power fails or OFF
DC SERVICE
Powers the DC Service Bus from the Battery when it has no other power source
BATTERY MASTER
On - Power the Battery Bus from both batteries
AUTO XFER
FAIL - A GCU has disabled a generator auto transfer due to an over current condition
Switchlight isolates AC Bus 1 or AC Bus 2 from being powered from any other source other than its onside Generator
Pressed In - Auto transfer has been manually disabled for the associated main AC Bus
IDG 1, 2 DISC
FAULT - HOTLOP in the Constant Speed Drive
DISC - IDG has disconnected from the accessory gear box due to over temperature or over torque
Pressed In - To manually disconnect the IDG
FIRE DETECTION
WARN - Simulates a fire. Tests loop continuity and the ability to detect a fire on all engine loops, all jet pipe loops, and the APU loops
FAIL: Simulates a short. Tests the short discriminator circuit on all engine loops, all jet pipe loops, and the APU loops
POWER/FUEL
PRESSED IN: The APU ECU is powered,
APU fuel SOV opens, APU door opens,
APU gauges appear on EICAS.
PUMP FAIL: The APU/CROSSFLOW pump
has failed.
SOV FAIL: The APU fuel SOV has failed.
HYDRAULIC
ON: (Ground) Selected electric hydraulic pump will operate as long as any AC
power source is available.
(Flight) Selected electric hydraulic pump will operate as it’s power source is available.
*Pumps 1B and 2B require that the cross-side IDG is operating.
HYDRAULIC PUMPS AUTO
Selected electric hydraulic pump will operate automatically when the flaps are not retracted and it’s power source is available.
- Pumps 1B and 2B require that the cross-side IDG is operating
PRESSURIZATION CONTROL
PRESSED IN/MAN: Select manual pressurization mode
FAULT: Both cabin pressure controllers
have failed
IDG will automatically disconnect
When an overtemperature or overtorque condition occurs
In the event of a complete AC power failure in flight
The ADG bus will then supply emergency power to the AC essential bus and the 3B hydraulic pump
*The AC essential bus will then power essential TRU 1, which will power the DC essential business
What is the Function of the APU
To Provide Electrical Power (30kva)
Air Conditioning
Bleed Air for Engine Start
Can you start the APU with a Main Battery failure?
No, both batteries are required.
DC external power can be used to start the APU
When does the CVR start recording?
When Electrical power is supplied to the aircraft
When does the FDR start recording?
Beacon, strobes or Weight Off Wheels
What voltage of electrical power does the CRJ use?
115 V AC and 28 V DC
What are the primary sources of AC electrical power?
Two engine-driven Integrated Drive Generators (IDGs)
What is the nominal rating of each Engine-Driven Generator
CRJ200: 30 kVA from 0 to 35,000 feet
25 kVA above 35,000 feet.
CRJ700: 40 kVA from 0 to 41,000 feet
What is an IDG made off?
A Constant Speed Drive and a Generator
What are the Secondary Sources of AC power?
APU
Air Driver Generator - ADG
AC Ground power from External Panel
What is the normal bus priority for AC BUS 1?
GEN 1
APU GEN
GEN 2
EXT PWR
What is the normal bus priority for AC BUS 2?
GEN 2
APU GEN
GEN 1
EXT PWR
What does the ADG powers in flight?
The AC ESS BUS and Hydraulic Pump 3B
What is Function of the PWR TXFR OVERRIDE button on the ADG panel?
Returns AC power and Hydraulic pump 3B to normal operation.
The Parameters for ADG deployment are?
Complete Power loss (AC BUS 1,2) all the Generators are off
Weight OFF Wheels
Parking Brake is off
*On the ground, if the parking brake is off before you shut off all the generators, the ADG may deploy.
In flight, when are AC UTIL BUS 1 and 2 loads shed?
When a generator fails and single generator operations occur
What are the primary sources of DC electrical power?
Five Transformer Rectifier Units (TRUs)
Two NiCad Batteries
DC Ground Power
Primary function of a TRU?
Rectifies 115 Vac electrical power to unregulated 28 Vdc
What are the Voltage Ratings on the batteries
The Main Battery is a 24 Vdc 17 amp
The APU Battery is a 24 Vdc 43 amp
*The batteries are capable of supplying approximately 30 minutes of DC emergency power
When is the DC EMER BUS displayed on the DC ELECTRICAL synoptic page?
When the bus is faulted and NOT powered
In the event of the failure of AC BUS 2, how many TRUs would be unpowered?
The 3 TRUs are powered by AC BUS 2
AC BUS 1
AC BUS 2
AC SERV BUS
In the event of the failure of AC BUS 1, how many TRUs would be unpowered?
2 TRUs are powered by AC BUS 1
TRU 1
ESS TRU
What are the sources of Bleed Air for Aircraft Cooling?
APU, Engines, External Air Cart
How many smoke detectors are installed in the Cargo Bay?
Two
What does the illumination of the FAIL portion of a L/R PACK
Over-pressure or over-temperature
Where are the Dual and Single Loop Fire Detection System?
Dual Loops - The engines, jetpipes, pylons, and the APU
Single Loop - The main landing gear wheel bins
What happens when the LH or RH ENG FIRE PUSH switchlight is pressed?
• Both squibs are armed
• Fuel feed shutoff valve CLOSES
• Bleed air shutoff valve CLOSES
• Hydraulic shutoff valve CLOSES
• Engine generator is tripped OFF
What occurs when the APU ENG FIRE PUSH switchlight is pressed?
- APU shut downs
* Both squibs are armed
• APU fuel feed shutoff valve CLOSES
• APU LCV CLOSES
• APU generator is tripped OFF.
What occurs when either of the CARGO SMOKE PUSH switchlights is pressed?
- Cargo compartment fan stops
* Recirculation SOV CLOSES
• Optional heater shuts down
• Exhaust SOV CLOSES
When does the Fuel System Computer transfers fuel from the Center Tank to the Wing Tanks?
When a Wing Tank fuel level drops to 94%
Via the Transfer Ejectors till the wing Tank reaches 97%
What kind of pumps does the Hydraulic Systems have ?
1A and 2A are Engine Driven Pumps
The “B” pumps and 3A are AC motor pumps
How are Hydraulic Systems 1 and 2 cooled?
Oil and Heat Exchanger
RAM Air
Electric Cooling Fan
*Hydraulic System 3 is not near any heat sources and because of its larger quantity has no provision for cooling
What is the main function of the 14th-Stage Isolation Valve?
Allows both wings to be anti-iced from a single source in the event of valve failure or engine failure
On the ANTI-ICE synoptic page, what is the significance of the valves labeled CMD in cyan?
Indicate the commanded position of the switch and not necessarily the actual position of the valves.
Which Hydraulic System powers the landing gear, nosewheel steering, and brake systems?
System 3
What are the primary functions of the PSEU?
- Landing gear
- Disables/rearms the anti-skid and nosewheel steering system
What is the function of the Chine Tires on the nose gear?
To eject ground water away from aircraft engines
What conditions must be met for an accurate reading of the Brake Wear Indicator Pins
The Brake Wear Indicator Pins must be checked with the brakes applied and Hydraulic Systems 2 and 3 pressurized
When does the Anti-Skid become operation after touchdown?
When a 35-kt wheel spin-up signal is generated or a WOW signal is present after a 5-second delay
- Minimum speed to operate is 10kts
How are the Emergency Lights powered?
Four independent rechargeable battery packs that provide 15 minutes of energy
*Batteries are charged via the DC ESS BUS
The BULK FUEL Temperature must be above ____________for take off
-29C
The 10th stage ISOL Valve and 14th stage SOVs fail________
10th Stage - Closed
14th Stage - Open
How are the fuel Tanks vented?
NACA scoops on the under side of the wings
Bleed Air Leak Detection - Which is Single and which is Dual Loop
10th Stage - Dual Loop
14th Stage - Single Loop
With the EMER LTS switch in the ARM position, when would the emergency light illuminate?
When Essential DC or Essential AC power is lost
What does BLEED MISCONFIG caution message indicate?
The 10th-stage bleed valves are still open in takeoff/landing configuration with wing and/or cowl anti-ice ON
What kind of engines does the CRJ200 have?
General Electric CF34-3B1 high-bypass ratio turbine engines
Providing 8,729 lbs of Thrust that can be increased 2% by the APR System to 9220 lbs
What powers Ignition System A and B?
A is powered by the AC Essential Bus
B is powered by the Battery Bus
