Gulfstream V Systems Review
courtesy of Jeff Beck
PRESSURIZATION
- How many channels does the cabin pressure controller have?
- Two (2)
- The cabin pressure controller has two channels. how many are in use at any given time?
- One (1)
- The cabin pressure controller has two channels. how can we tell which one is in use?
- ECS/pressurization synoptic page
- How many motors does the cabin outflow valve have to open and close it?
- Two ac motors, one for each channel in semi and auto. One dc motor for manual operation.
- The cabin outflow valve has three motors to open and close it. What is the motive force for these motors?
- Electric
- The cabin outflow valve has three electric motors to open and close it. What kind of electrical power are they?
- Two AC, one DC
- The cabin outflow valve has three electric motors to open and close it. Two are AC, one is DC. What controls the AC motors?
- The active cabin pressure controller channel, semi or auto
- The cabin outflow valve has three electric motors to open and close it. Two are AC, one is DC. What controls the DC motor?
- Cabin pressure control panel in manual
- In the auto mode, what provides the altitude, pressure altitude, corrected barometric pressure, ground speed, and landing field elevation to the active controller channel?
- FMS
- What is displayed on the cabin selector panel (pedestal) when in auto?
- FMS derived data
- How or where do you control pressurization parameters when operating in semi mode?
- Cabin pressure selector panel
- What does an amber "fault" illuminated on the cabin pressure control panel mean?
- (Will also have a "CPC chnl 1-2 fail" msg on CAS.) Both channels have failed. Must go manual and manually control the outflow valve.
- Where does the cabin pressure indicator receive its information from in semi or auto modes?
- Active control channel.
- In manual mode, where does the cabin pressure indicator receive its data from?
- The cabin pressure acquisition module (CPAM)
- At what positive pressure will the pressure relief valve open?
- 10.48 PSI
- At what negative pressure will the pressure relief valve open?
- -.25PSI
- In normal ops, cabin pressure mode is auto, will the pressure relief valve be open on the ground?
- Yes
- On the ground, APU running, APU bleed air on, both packs on. What will happen to the packs when the start master switch is pressed?
- The right pack will turn off
- On the ground, APU running, APU bleed air on, both packs on. What will happen to the packs when the right engine start switch is pressed?
- The left pack will shut down
- On the ground, APU running, APU bleed air on, both packs on. When the right engine start switch is pressed the left pack will shut down. When will the pack turn back on?
- When the starter air valve has closed
- What controls the ECS packs?
- Air conditioning controllers in aft EER
- What controls the ECS pack discharge air temp and prevents ice accumulation inside the pack?
- Air conditioning controller
- On the ground, when does the "flight/landing" capsule automatically change from landing to flight?
- Speed greater than 8 knots or throttles to takeoff power
- When on the ground, you taxi greater than 8 knots and the "flight/landing" capsule changes to flight. What is the aircraft now pressurized to?
- 500 feet below takeoff elevation
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