Air Systems Pressurization
The maximum cabin differential pressure (relief valves) is 9.1 psi.
Non–AFM Operational Information
Note:  The following items are not AFM limitations, but are provided for flight crew information.
With engine bleed air switches ON, do not operate the air conditioning packs in HIGH for takeoff, approach or landing.
Anti–Ice, Rain
Engine TAI must be on when icing conditions exist or are anticipated, except during climb and cruise below -40°C SAT.
Autopilot/Flight Director System
Use of aileron trim with the autopilot engaged is prohibited.
Do not engage the autopilot for takeoff below 400 feet AGL.
For single channel operation during approach, the autopilot shall not remain

engaged below 50 feet AGL.

Maximum allowable wind speeds when landing weather minima are predicated on

autoland operations:

.  
Headwind 25 knots

.  
Crosswind 20 knots
YA613 - YC413, YK101 - YK104

.
Tailwind 10 knots. YD651 - YD655

.  
Tailwind:

Field Elevation  Flaps 30  Flaps 40 
2000 feet or less  10 knots  10 knots 
2001 to 4000 feet  10 knots  10 knots 
4001 to 6000 feet  5 knots  10 knots 
Greater than 6000 feet  0 knots  10 knots 

Maximum and minimum glideslope angles are 3.25 degrees and 2.5 degrees respectively.
Copyright . The Boeing Company. See title page for details.
L.10.4   September 29, 2005

Limitations -Operating Limitations 737 Flight Crew Operations Manual
Autoland capability may only be used with flaps 30 or 40 and both engines operative.
YA721 - YA802 Autoland capability may only be used to runways at or below 8,400 ft pressure altitude.
Communications
YA809, YC411, YC413
Do not use VHF–3 (if installed for voice communication) for ATC
communications with ACARS operational.

YA613, YA626, YA801 - YK104
Flights predicated on the use of the following frequencies (MHz) are prohibited:
29.490, 29.489.

YA613, YA626, YC411, YC413
Flights predicated on the use of the following HF frequencies are prohibited:

.  
11.133 MHz . 22.434 MHz

.  
22.683 MHz . 22.766 MHz.

Aircraft Communications Addressing and Reporting System YA721 - YD655
The ACARS is limited to the transmission and receipt of messages that will not create an unsafe condition if the message is improperly received, such as the following conditions:
.  
the message or parts of the message are delayed or not received,

.  
the message is delivered to the wrong recipient, or

.  
the message content may be frequently corrupted.
However, Pre-Departure Clearance, Digital Automatic Terminal
Information Service, Oceanic Clearances, Weight and Balance and

Takeoff Data messages can be transmitted and received over ACARS if they are verified per approved operational procedures.
Non–AFM Operational Information
Note:  The following items are not AFM limitations, but are provided for flight crew information.
Use the VHF radio connected to the top of fuselage antenna for primary ATC communications on the ground.
Copyright . The Boeing Company. See title page for details.
Limitations -Operating Limitations 737 Flight Crew Operations Manual

Engines and APU Engine Limit Display Markings
Maximum and minimum limits are red. Caution limits are amber.
Engine Ignition
Engine ignition must be on for:
.
takeoff

.
landing
. operation in heavy rain

.
anti-ice operation.

Reverse Thrust
Intentional selection of reverse thrust in flight is prohibited.
APU
Inflight - APU bleed + electrical load: max alt 10,000 ft.
Ground only - APU bleed + electrical load: max alt 15,000 ft.
APU bleed: max alt 17,000 ft.
APU electrical load: max alt 41,000 ft.

Non–AFM Operational Information Note: The following items are not AFM limitations, but are provided for flight crew information. APU bleed valve must be closed when:
.
ground air connected and isolation valve open

.
engine no. 1 bleed valve open

.
isolation and engine no. 2 bleed valves open.

APU bleed valve may be open during engine start, but avoid engine power above idle.
Flight Controls
Max flap extension altitude is 20,000 ft.
Holding in icing conditions with flaps extended is prohibited.
Do not deploy the speedbrakes in flight at radio altitudes less than 1,000 feet.
In flight, do not extend the SPEED BRAKE lever beyond the FLIGHT DETENT.
　
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