Air Conditioning, Pressurization, Pneumatics, Ice & Rain Flashcards
(34 cards)
How many ways are there to OPEN the Bleed Air Isolation Valve?
- CRANK MASTER switch
- START MASTER switch
- APU BLEED AIR switch
- MANUALLY
When will the APU Bleed Switch open the Isolation Valve?
60 seconds after the APU reaches 100%
The 8th stage bleed air augments the 5th stage. Can you select 8th bleed air ON?
NO - it is opened automatically by the Bleed Air Controller (BAC)
14 psi, 24 psi, and 35 psi are three set point trigger values in the BAC (Bleed Air Controller) to kick in the 8th stage Bleed Air. What operation mode causes this?
- 14 psi (normal)
- 24 psi (low power settings: descent / holding) normal
- 35 psi (single pack operations)
- 40 psi (max)
What is the minimum pack pressure for single pack operation?
35 psi
The BLEED AIR CONFIGURATION CAS message illuminates for?
- APU & ENGINE BLEED AIR selected simultaneously
- ISOLATION VALVE OPEN with BOTH ENGINE BLEED AIR switches selected ON
What is the temperature range in AUTO?
60F - 90F
What is the temperature range in MANUAL?
35F - 230F
If the AUTO TEMP SELECT pushbutton is selected OFF and the TEMP DISPLAY button is Selected to DUCT, the digital temperature readouts reflect the:
Actual Temperature in the supply ducts to the air conditioned areas
What happens when you select the RAM AIR switch?
- Both AC packs turn off
- A/C depressurizes at cabin leak rate
The TROV is electrically operated in response to the Cabin Pressure Controller (CPC) what are the modes of operation?
- AUTO
- SEMI
- MANUAL
During takeoff and departure, climbing to FL410, automatic anti-icing is inhibited:
Below 1,500 feet AGL and above 35,000’
Automatic anti-ice is available during descent and landing when:
From 35,000’ to landing
With WING ANTI-ICE operating, the Bleed Air Controller (BAC) maintains the wing leading edge at a temperature of:
130F
When the CABIN WINDOW HEAT switch is pushed on the ground, the switch capsule should:
Illuminate OFF (BLUE)
The EVS switch on the overhead panel applies heat for:
Two (2) minutes until it turns off or when it detects a temperature higher than 14F
During taxiing or holding on the ground at low power settings in temperatures less than +1C, it is recommended that just prior to takeoff the engine should be:
Accelerated to 40% LP RPM for 10 seconds and at intervals of 1 hour.
How many motors are available for pressurization TROV operation?
Three (3), 2 for Automatic, and 1 for Manual
What are the power sources for the pressurization motors?
- Two (2) A/C (AUTO/SEMI)
- One (1) D/C (MANUAL)
In AUTO, where does the pressurization information come from?
MCDU
Maximum cabin pressure differential (psi) permitted for taxi, takeoff, and landing is:
0.3 psi
What are the trip points for the Cabin Pressure Relief Valve?
- Cabin Differential 10.28 Amber CAS
- Cabin Differential 10.48 Red CAS
- Negative Differential pressure relief at -0.25psi
The pressurization system will change from LANDING to FLIGHT when:
- Taxi speed is EQUAL OR GREATER than 8 knots
- Power levers advanced fifteen (15) degrees forward
What are the “Cabin Pressure Low” CAS Trip Points?
- 8000’ - LFE (Landing Field Elevation) less than 7,500
- 10,000’ - LFE greater than 7,500’, but less than 9,500
- 14,500’ - LFE greater than 9,500’
- 10,000’ - Manual Mode
14,750’ (+/-250) Cabin Altitude / Oxygen Masks drop down automatically)
