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Standby / Altn Light ............................................................ ILLUMINATED
Cabin Altitude Selector (If Installed)........................................................SET
Set CAB ALT to takeoff field elevation minus 200 feet.
Cabin Rate Selector (If Installed)........................................................INDEX
Flight Ground Position Switch (If Installed)..........................................GRD
Programs the main outflow valve to full open.
- - - - - AFTER START - - - - -
Air Conditioning Pack Switches ........................................................... AUTO
Flight / Ground Position Switch (If Installed)......................................... FLT
This causes the main outflow valve to program toward CLOSE, pressurizing
the aircraft to .125 PSI (200 feet below field elevation).
Note: With ALTN the aircraft will pressurize automatically after the
engines have recovered 60% N1 during takeoff roll.
- - - - - AFTER TAKEOFF - - - - -
Cabin Altitude Indicator ......................................... SET / (AS REQUIRED)
Check the placard below the pressurization module for the cabin altitude
corresponding to the planned flight altitude. Reset CAB ALT to this altitude.
Cabin Rate Selector (If Installed)..................................................... ADJUST
Adjust the cabin rate of climb, if necessary, to maintain the desired climb
rate.
- - - - - CRUISE - - - - -
Cabin Altitude Indicator (If Installed) ...............................................RESET
Reset CAB ALT using the placard for flight altitude changes greater than 1000
feet.
(Continued)
AIR SYSTEMS
Sec. 2.2 Page 24
Rev. 11/15/02 #41
Continental
737
Flight Manual
- - - - - BEFORE DESCENT - - - - -
Cabin Altitude Indicator (If Installed) .....................................................SET
Set CAB ALT to landing field elevation minus 200 feet.
- - - - - DESCENT - - - - -
Cabin Rate Selector (If Installed)..................................................... ADJUST
Adjust the cabin rate of descent, if necessary, to maintain the desired
descent rate.
- - - - - AFTER LANDING - - - - -
Flight/Ground Position Switch (If Installed)..........................................GRD
* * * *
UNPRESSURIZED LANDING PROCEDURE –
DIGITAL AND NON-DIGITAL
This procedure is used when:
· APU bleed air is inoperative and,
· Engine bleed air switches are required to be OFF and,
· Pressurization system functions normally.
Note: The items that are referenced with (If Installed) are additional items
that will be complete for aircraft with non-digital controllers.
- - - - - LANDING - - - - -
When below 10,000 ft:
Set cabin altitude indicator 1,500 ft. above landing field elevation.
Cabin Rate Selector (If Installed)........................................................INDEX
Pressurization Mode Selector (If Installed) ..........................................STBY
When Starting Final Approach:
Engine Bleed Air Switches..........................................................OFF
Avoid high rates of descent for passenger comfort.
* * * *
737
Flight Manual
Continental
AIR SYSTEMS
Sec. 2.2 Page 25
Rev. 11/15/02 #41
UNPRESSURIZED TAKEOFF PROCEDURE –
DIGITAL AND NON-DIGITAL
- - - - - TAKEOFF - - - - -
This procedure is used when:
· APU bleed air is inoperative and,
· Engine bleed air switches are required to be OFF and,
· Pressurization system functions normally.
Note: The items that are referenced with (If Installed) are additional items
that will be complete for aircraft with non-digital controllers.
Air Conditioning Pack Switches ...............................................BOTH AUTO
Isolation Valve Switch.......................................................................... CLOSE
Engine Bleed Air Switches ........................................................................OFF
Cabin Altitude Selector (If Installed)........................ SET 2000 FT ABOVE
FIELD ELEVATION
Cabin Rate Selector (If Installed)........................................................INDEX
Pressurization Mode Selector(If Installed) ...........................................STBY
Flight/Ground Switch (If Installed).......................................................... FLT
- - - - - AFTER TAKEOFF - - - - -
At not less than 800 ft. and prior to 2,000 ft. above field elevation:
No. 2 Engine Bleed Air Switch....................................................................ON
If engine failure occurs, do not position ENGINE BLEED switches ON until
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