Oral Study Guide (green writing) Flashcards
What does the AVAIL light mean?
AVAIL switch light indicates correct voltage, frequency, and phase.
What are the sources of AC power in the CRJ 900?
- 2 engine driven generators
- APU Generator
- 1 Air Driven Generator
- 1 AC External Power Plug In
What does the Generator Control Unit do?
Controls and monitors the generators and provides protection and voltage regulation for each generator.
What is the main battery rated to?
17 amps 24 volt
How long can the battery master be left on without another power source?
5 minutes
Why does the CRJ 900 have this limitation? (Battery master can only be left on for 5 mins)
5 minutes because ED1 and ED2 utilize AC cooling fans. ED1 and ED2 will overheat after 5 minutes.
What is an IDG and what does it do?
The Integrated Drive Generators convert variable N2 speed to a constant 12,000 RPM generator speed.
What are the generators rated to?
40KVA, 115VAC, 400HZ
What is the APU Generator rated to?
40KVA, 115VAC, 400HZ
When would the ADG automatically deploy?
When AC BUS 1 and AC BUS 2 lose power
What is the ADG rated to?
15KVA, 115VAC, 400HZ
What does the ADG power?
- AC ESS Bus
- HYD Pump 3B
- STAB TRIM CH2
- FLAPS/SLATS 1/2 Speed
What would cause the FAULT light on the IDG to illuminate?
High oil temperature and/or low oil pressure
What will cause the AC ESS XFER switch light to illuminate?
The AC ESS XFER switch light will illuminate anytime the AC ESS Bus is not being powered by AC BUS 1.
What is the priority for the Auto XFER?
- On side generator
- APU
- Off side generator
- External Power
What would cause the FAIL light to illuminate on the AUTO XFER switch light?
The GCU has detected a Bus Fault or a Generator Overcurrent
When the LH or RH ENG FIRE PUSH switch lights are selected, what happens?
- Fuel SOVs Close
- Hydraulic SOVs Close
- Bleed Air SOVs Close
- IDGs are taken offline
- Engine bottle squibs are armed
What happens if a crewmember selects the L HYD SOV?
The Left HYD SOV closes and the flow of hydraulic fluid is shut off to the engine driven pump.
The QRH asks the crew to verify that the SOV is closed, where is the L HYD SOV located?
How many hydraulic systems does the CRJ900 have?
Hydraulic power is provided by 3 independent systems
What is the hydraulic system normal pressure?
3000 PSI
What is the normal hydraulic fluid quantity?
45%-85%
During normal cruise flight, how many pumps would be operating?
3 hydraulic pumps
What causes the backup (b) pumps to turn on?
Flaps greater than zero
What lighting should be on when instructed to “Line Up and Wait”?
All lights except landing and taxi lights
What would cause a boost pump to automatically turn on?
Low fuel pressure at the main ejector
In AUTO Mode, when would the system begin to transfer fuel?
When an imbalance of more than 200 lbs exists
When will the system stop transferring fuel?
When the fuel tanks are balanced plus 50 lbs
What would cause the GRAVITY XFLOW FAIL light to illuminate?
The gravity crossflow valve is in the uncommanded position
Can you identify the gravity crossflow valve?
How many fuel pumps does the CRJ 900 have?
5 total
• 2 engine driven
• 2 boost pumps
• 1 APU pump
What is the max fuel imbalance for takeoff?
300 lbs
What is the maximum fuel imbalance for all other phases of flight?
800 lbs
What would cause the fuel SOVs to close?
The engine fire push switch
After selecting the APU PWR FUEL switch, what must the crew observe prior to selecting the START/STOP switch?
- APU SOV OPEN status message
- APU IN BITE status message
- APU RPM and EGT gauges are displayed
- APU DOOR OPEN message is displayed
When will the APU AVAIL light illuminate?
At 99% RPM plus 2 seconds
What is the maximum altitude for operating the APU?
FL410
What is the maximum altitude to start the APU?
FL370
What is the maximum altitude for bleed air extraction?
FL250
If the APU door position is unknown or OPEN with the APU not operating, what airspeed is the crew restricted to?
220 KIAS
What APU exhaust hazard area exists for the CRJ 900?
No hazard area due to the height of exhaust
Where does the APU receive its fuel from?
Left collector tank
In the event that the APU pump fails, will the APU continue to operate?
Yes, if the APU pump fails, an internal bypass valve opens
How much voltage must batteries have prior to start attempt?
22 Volts on each battery
If there is a fire in the APU, what prevents/contains the fire from spreading to other areas?
The APU is surrounded by a titanium fire proof container
In the event of an emergency and the crew is not present, how can the ground crew shut down the APU?
What would happen if the APU caught fire and the aircraft was unattended?
The APU will automatically shut down and the APU bottle will discharge after 5 seconds
What would happen if the APU caught on fire when airborne?
The APU will shut down but the crew must discharge the bottle
What are the engine starter limitations?
- Attempts 1 and 2: 90 seconds ON, 10 seconds OFF
* Attempts 3 through 5: 90 seconds ON, 5 minutes OFF
What are the HOT START memory items?
Affected Thrust Lever………SHUTOFF
Dry Motor……..UNTIL ITT IS REDUCED BELOW 120°C OR STARTER LIMIT, WHICHEVER COMES FIRST
Affected engine, ENG STOP switch…….STOP
When must continuous ignition be used?
- Takeoff and landings on contaminated runways
- Flight through moderate or heavy rain
- Flight through moderate or greater turbulence
- Flight in vicinity of thunderstorms
How can the crew set Go Around Thrust?
TOGA
How can the crew set Max Continuous Thrust?
CLIMB
How can the crew set APR Thrust?
MAX POWER
What speed must the thrust reversers be idle power?
60 KIAS
Why does the CRJ 900 have this limitation? (Thrust reversers idle at 60 KTS)
FOD Ingestion hazard
When do icing conditions exist on the ground?
OAT is 10 degrees Celsius or below and visible moisture is present or surface contamination exists
What visibility value would be considered visible moisture?
1 SM or less
When do icing conditions exist in the air?
TAT is 10 degrees Celsius or below and visible moisture is present; Except when SAT is -40 degrees Celsius or below
What is bleed air used for in the CRJ900?
- Engine START
- Anti Ice
- Pressurization
- Air Conditioning
- Avionics cooling
What stage of the engine normally supplies bleed air?
The 6th stage is the normal source of bleed air
What happens when there is a higher demand for bleed air than that stage is capable of producing?
When demand exceeds the 6th stage capability, the HPV opens to supply 10th stage bleed air
What PSI does the pressure regulating function limit the bleed air output to the packs?
The pressure regulating function regulates the PSI to 45 PSI
At what cabin altitude would we receive the Cabin Altitude CAUTION?
CABIN ALT caution message: cabin altitude >8,500’
At what cabin altitude would we receive the Cabin Altitude WARNING?
CABIN ALT warning message: Voice message - “CABIN PRESSURE” cabin altitude >10,000’
How can the crew manually decrease cabin altitude?
- Select PRESS CONTROL to MAN
- MAN ALT ON
- Adjust MAN RATE to desired rate
How many pressure controllers does the CRJ900 have?
2
Do both pressure controllers operate at the same time?
No
How is it determined which PC is used?
WOW + 3 minutes
When EMER DEPRESS is selected, what happens to the aircrafts pressurization state?
The aircraft will depressurize to 14,500’ +/- 500’
What would cause a pack fault?
Over temperature or over pressure
What is the single pack limitation?
FL250
What is the maximum altitude to select RAM-AIR?
15,000’
How can the crew manually cool down the cabin?
When must the CARGO COND AIR be selected ON?
When live animals are in the cargo hold
Which side of the mixing manifold does the RAM-AIR supply air to?
RAM-AIR provides ram air to the right side of mixing manifold
Which of the cargo bays are pressurized?
Both FORWARD and AFT Cargo Bays are pressurized
Can we carry live animals in both cargo bays?
Live animals may only be carried in the AFT cargo bay
What is the aft cargo weight limitation?
4375 lbs
What is the forward cargo weight limitation?
850 lbs each
What is the cargo floor loading limitation?
75 lbs per square ft
What can be done if an item exceeds this limitation? (Cargo bay pounds per square footage limit)
Pallet the item
If we are flying at 250 knots, temperature is 3C, we are in the clouds, there is NO “ICE” annunciated, what should be on wings or cowls?
Cowls
What airspeed determines wing anti-ice usage?
230 KIAS
Which hydraulic system is used for landing gear extension and retraction?
Hydraulic system 3
Which hydraulic system is requested for alternate landing gear extension?
Hydraulic system 2
What is the maximum speed for landing gear retraction?
200 KIAS
What is the maximum speed for landing gear extension?
220 KIAS
What is the maximum tire speed?
195 knots
After Type 4 fluid has been applied, if needed for taxi, what anti ice system should be on? Wings? Cowls?
Only cowls should be selected on
What are the effects of ice and front contamination?
- Increased weight
- Loss of lift
- Increased drag
- Loss of control
When must we hold short of the ILS critical area marking?
When instructed by ATC
While holding short, what margin of safety does the taxiway hold position markings provide?
Wingtip clearance from passing aircraft
If we are flying into an uncontrolled airport during hours of darkness, how will we turn on the runway lighting?
Click the mic 3 for low, 5 for medium, 7 for high
What is the lowest reported RVR required to initiate a CAT II approach?
1200 RVR
When setting up for a CAT II approach what is decision height determined by?
Radar Altitude
What is the lowest visibility required for takeoff per Mesa Operations Specifications?
500 RVR
What is the lowest visibility for a First Officer to conduct a takeoff?
1 SM
When is a destination alternate required?
If weather reports indicate that:
• 1 hour before to 1 hour after the ETA
• Ceiling will be at least 2000’ AGL
• Visibility must be at least 3 S/M
How many RVR reporting systems are required for a 500 RVR takeoff?
Minimum of 2 reporting systems
Maximum demonstrated crosswind?
32 KTS
Is the max demonstrated crosswind a limitation?
No
Maximum tailwind for takeoff?
10 KTS
