CAB ALT indicator (as installed) ............................... 200 feet below destination field elevation
If landing altitude is above 6000 feet:
Accomplish the Automatic Pressurization Control - Landing Airport
Elevation Above 6000 Feet Supplementary Procedure.
Automatic Pressurization Control – Landing Airport Elevation Above 6000 Feet
If flight is less than one hour and landing altitude is below 9500 feet:
Accomplish Normal Procedures.
Note: (Airplanes with CPCS) On very short flights where large changes in cabin altitude are required, it may be necessary to use the standby mode and increase the cabin rate of climb to achieve the desired cabin altitude in the time available.
If flight is more than one hour or landing altitude is at or above 9500
feet:
Accomplish Normal Procedures except as modified below.
Copyright . The Boeing Company. See title page for details.
SP.2.8 June 4, 2004
Supplementary Procedures -Air Systems 737 Operations Manual
Prior to takeoff: LAND ALT indicator ......................................................6000 feet CAB ALT indicator (as installed) ...................................6000 feet
At initial descent or approximately 20 minutes prior to landing: LAND ALT indicator .......................... Destination field elevation CAB ALT indicator (as installed) .........................................Reset
Reset CAB ALT to destination airport elevation minus 200 feet. If landing elevation is above 9500 feet: When cabin altitude warning sounds:
Oxygen masks and regulators ...............................ON, Normal Supplemental oxygen must be used anytime the cabin altitude is above 10,000 feet.
ALT HORN CUTOUT switch ..........................................Push
Unpressurized Takeoff and Landing
When making a no engine bleed takeoff or landing with the APU inoperative:
Takeoff
PACK switches ..............................................................................AUTO ISOLATION VALVE switch ....................................................... CLOSE Engine BLEED air switches ............................................................. OFF Airplanes with CPCS
CAB ALT indicator ..................... Set 2000 feet above field elevation
Cabin rate selector ......................................................................Index
Pressurization mode selector .................................................... STBY
FLT/GRD switch ..........................................................................FLT
Supplementary Procedures -Air Systems 737 Operations Manual
After Takeoff
Note: If engine failure occurs, do not position engine BLEED air switches ON until reaching 1500 feet or until obstacle clearance height has been attained.
At not less than 400 feet, and prior to 2000 feet above field elevation: Engine No. 2 BLEED air switch ................................................... ON
When CABIN rate of CLIMB indicator stabilizes: Engine No. 1 BLEED air switch ................................................... ON ISOLATION VALVE switch ................................................... AUTO
Airplanes with CPCS: Pressurization mode selector ................................................... AUTO
Landing
When below 10,000 feet:
Airplanes with CPCS: CAB ALT indicator............................1500 feet above field elevation Cabin rate selector ..................................................................... Index Pressurization mode selector ....................................................STBY When starting final approach turn:
Engine BLEED switches ........................................................OFF
Avoid high rates of descent for passenger comfort.
Airplanes with DCPCS:
When starting final approach turn:
Engine BLEED air switches ........................................................OFF Avoid high rates of descent for passenger comfort.
No Engine Bleed Takeoff and Landing
When making a no engine bleed takeoff or landing with the APU operating.
Copyright . The Boeing Company. See title page for details.
SP.2.10 December 3, 2004
Supplementary Procedures -Air Systems 737 Operations Manual
Takeoff
Note: If anti–ice is required for taxi, configure for a “No Engine Bleed Takeoff” just prior to takeoff. Note: If anti–ice is not required for taxi, configure for a “No Engine Bleed Takeoff” just after engine start. Right PACK switch........................................................................AUTO ISOLATION VALVE switch ....................................................... CLOSE Left PACK switch ..........................................................................AUTO Engine No. 1 BLEED air switch ...................................................... OFF APU BLEED air switch......................................................................ON Engine No. 2 BLEED air switch ...................................................... OFF
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