Pneumatic Flashcards
When will the BLEED AIR ISOLATION VALVE open?
Manually press
APU BLEED AIR switch
CRANK MASTER switch
START MASTER switch
When will the APU Bleed Switch open the Isolation Valve?
60 sec after APU reaches 100%
The BAC’s set point trigger values
Normal = 14 psi
Low power settings (descent/holding) = 24 psi
Single pack = 35 psi
8th stage air kicks in
Temp range in AUTO and MANUAL
AUTO = 60-90 F
MANUAL = 35-230 F
What happens when you select the RAM AIR switch?
Both AC packs turn off
Aircraft depressurizes at cabin leak rate
When is Auto Anti-Ice inhibited?
Below 1500’ AGL and >FL350
BAC maintains wing leading edge temp of ___ with wing anti-ice
130 F
The EVS switch on the overhead panel applies heat for…
2 minutes until it turns off or when it detects a temp higher than 14 C
During taxing or holding on the ground at low power settings in temperatures less than +1°C. it is recommended that just prior to take off the engine should be:
Accelerated to 40% LP for 10 sec and at intervals of 1 hour
Power sources for the pressurization motors
2 AC (Auto/Semi)
1 DC (Manual)
How many motors are available for pressurization?
Three. 2 for auto, 1 for manual
Min cabin pressure differential for taxi, takeoff, or landing
0.3 psi
Trip Points for Cabin Pressure Relief Valve
10.28 Amber CAS
10.48 Red CAS
Negative differential pressure relief at -0.25
The pressurization system will change from LANDING to FLIGHT when
Taxi speed >= 8 kt
Power levers advanced 15° forward
Cabin Pressure Low CAS Trip Points
8,000’ when LFE < 7,500’
10,000’ when LFE 7,500 > 9,500’
14,500 when LFE >= 9,500’
10,000’ in Manual Mode
