Pressurisation

Question 1

OUTFLOW VALVE (OFV)
• 2 ___ motors (1 each for AUTO/MAN mode)
• Function in both AUTO and MAN pressurization modes
• AUTO – __ seconds to close
• MAN – __ sec to close
• OFV fail ___
• Normal press differential of ___ psi = 7000ft cabin altitude at FL450

Answer 1

OUTFLOW VALVE (OFV)
• 2 DC motors (1 each for AUTO/MAN mode)
• Function in both AUTO and MAN pressurization modes
• AUTO – 12 seconds to close
• MAN – 55 sec to close
• OFV fail close
• Normal press differential of 9.2 psi = 7000ft cabin altitude at FL450

Question 2

SAFETY VALVE (SV)
• Between ___ rudder pedals
• Positive pressure relief – opens from ___ (partial) to ___ psi (full)
• CAS (amber) – “DIFF 9.35”
• CAS (red) – “DIFF9.55 – PACK TO OFF”
• Negative pressure relief – max ___ psi differential, Back up by ram air check valve

Answer 2

SAFETY VALVE (SV)
• Between CP rudder pedals
• Positive pressure relief – opens from 9.35 (partial) to 9.45 psi (full)
• CAS (amber) – “DIFF 9.35”
• CAS (red) – “DIFF9.55 – PACK TO OFF”
• Negative pressure relief –max 0.75 psi differential, Back up by ram air check valve

Question 3

MAX CABIN ALTITUDE LIMITATION
• Prevent exceeding ______ ft
• Dump switch
• Malfunction

Answer 3

MAX CABIN ALTITUDE LIMITATION
• Prevent exceeding 15200 ft
• Dump switch
• Malfunction

Question 4

MED AND BAGGAGE DOOR
•  Door not closed signals
•  No pressurization up to \_\_\_\_\_ ft
•  Aircraft between 14000 and 15000 ft – depressurize at < 1000 fpm to cabin altitude of 14000 +/- 500 ft
•  Above 15000ft, signal ignored

Answer 4

MED AND BAGGAGE DOOR
•  Door not closed signals
•  No pressurization up to 14000 ft
•  Aircraft between 14000 and 15000 ft – depressurize at < 1000 fpm to cabin altitude of 14000 +/- 500 ft
•  Above 15000ft, signal ignored

Question 5

HIGH CABIN ALTITUDE WARNING
•  Aircraft below 25000ft – 14750ft
   o  In ground mode
   o  Climb mode takeoff >8000ft
   o  Descend mode takeoff >8000ft
•  Aircraft above 25000ft – 10000ft
   o  LFE <8000ft

Answer 5

HIGH CABIN ALTITUDE WARNING
•  Aircraft below 25000ft – 14750ft
   o  In ground mode
   o  Climb mode takeoff >8000ft
   o  Descend mode takeoff >8000ft
•  Aircraft above 25000ft – 10000ft
   o  LFE <8000ft

Question 6

TAKEOFF MODE
• Cabin sealed - ____ psid
• >90 kts or PLA > 35 deg – pre-pressurize to ____ ft at 1000 fpm max
• Descend mode when altitude drop > ___ ft (return to airport)
• Abort – takeoff elevation at ___ fpm for ___ secs then PFV fully open

Answer 6

TAKEOFF MODE
• Cabin sealed - 0.075 psid
• >90 kts or PLA > 35 deg – pre-pressurize to -300 ft at 1000fpm max
• Descend mode when altitude drop > 500 ft (return to airport)
• Abort – takeoff elevation at 500 fpm for 60 secs then PFV fully open

Question 7

CLIMB MODE
• Signal from gear switch or > ___ kts
• Scheduled climb at up to ___ fpm to ___ ft
• Cabin clamp
o Aircraft altitude stable for 1 min (< +/-100ft)
o no change within +/-200ft

Answer 7

CLIMB MODE
• Signal from gear switch or > 100 kts
• Scheduled climb at up to 500 fpm to 7000 ft
• Cabin clamp
o Aircraft altitude stable for 1 min (< +/-100 ft)
o no change within +/-200 ft

Question 8

DESCEND MODE

• > ___ ft descend, cabin descends at up to ___ fpm until LFE

Answer 8

DESCEND MODE

• > 200 ft descend, cabin descends at up to 300fpm until LFE

Question 9

LANDING MODE
• WOW
• +500 or -300 fpm, ___ sec after landing

Answer 9

LANDING MODE
• WOW
• +500 or -300 fpm, 50sec after landing

Question 10

GROUND MODE

• After ___ secs OFV full open

Answer 10

GROUND MODE

• After 60 secs OFV full open

Question 11

ADM
• __ engaged
• > ____ ft
• Cabin Alt > ____ ft

Answer 11

ADM
• AP engaged
• > 34000 ft
• Cabin Alt > 10000 ft

Question 12

ADM
•  HDG mode 90 left turn
•  AT engage and throttle to idle
•  AL selector to 15000ft
•  Airspeed Vmo/Mmo
•  5 sec transponder to 7700
•  XX secs CPDLC
•  Left orbit at 225 kts at 15000ft
•  Cancelled by AP disengage

Answer 12

ADM
•  HDG mode 90 left turn
•  AT engage and throttle to idle
•  AL selector to 15000ft
•  Airspeed Vmo/Mmo
•  5 sec transponder to 7700
•  XX secs CPDLC
•  Left orbit at 225 kts at 15000ft
•  Cancelled by AP disengage

Question 13

DUMP
• OFV opens (in both AUTO or MAN)
• Depressurize to 14000 ft if aircraft above 14500 ft
• Depressurize to ambient pressure if below 14500 ft
• 8000 fpm

Answer 13

DUMP
• OFV opens (in both AUTO or MAN)
• Depressurize to 14000 ft if aircraft above 14500 ft
• Depressurize to ambient pressure if below 14500 ft
• 8000 fpm

Question 14

AUTO OXYGEN DEPLOYMENT
• 14750 ft high LFE
• 13500 ft

Answer 14

AUTO OXYGEN DEPLOYMENT
• 14750 ft high LFE
• 13500 ft

Question 15

DITCH

• Fully close OFV (12 secs AUTO or 55 secs MAN)

Answer 15

DITCH

• Fully close OFV (12 secs AUTO or 55 secs MAN)

Question 16

BAGGAGE COMPARTMENT
• By air from main cabin
• If pressurization is lost, cabin isolation valve is closed automatically

Answer 16

BAGGAGE COMPARTMENT
• By air from main cabin
• If pressurization is lost, cabin isolation valve is closed automatically

Question 17

LIMITATIONS
• Max LFE - 10000 ft
• Max Alt - 45000 ft
• Min Alt -1400 ft
• Max normal cabin diff - 9.2 psi
• Max diff for taxi, TO and landing - 0.2 psi
• Baggage door access above 40000 ft for emergency only (certification - in case of baggage compartment rapid depressurization)

Answer 17

LIMITATIONS
• Max LFE - 10000 ft
• Max Alt - 45000 ft
• Min Alt -1400 ft
• Max normal cabin diff - 9.2 psi
• Max diff for taxi, TO and landing - 0.2 psi
• Baggage door access above 40000 ft for emergency only (certification - in case of baggage compartment rapid depressurization)