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After completing the turn, and at or above flap retraction altitude, accelerate and retract flaps while climbing.
Note:  The possibility of an engine failure along the departure track must be
considered. Special engine out procedures, if available, are preferable to a
takeoff weight reduction to ensure all obstacles are cleared.

737 Flight Crew Training  Manual

Roll Modes
737-300 - 737-500 After takeoff and climb is stabilized, select LNAV after passing 400 feet AGL. If the departure procedure or route does not begin at the end of the runway, it may be necessary to use the HDG SEL mode at 400 feet AGL to intercept the desired track for LNAV capture. When the departure procedure is not a part of the active flight plan, use HDG SEL or VOR LOC mode. When an immediate turn after takeoff is necessary, the desired heading may be preset before takeoff.
737-600 - 737-900 After takeoff and climb is stabilized, select LNAV (if not selected before takeoff) after passing 400 feet AGL. If LNAV is selected for takeoff, LNAV guidance becomes active at 50 feet AGL if the active leg is within 3.0 NM and 5° of the runway heading. If the departure procedure or route does not begin at the end of the runway, it may be necessary to use the HDG SEL mode at 400 feet AGL to intercept the desired track for LNAV capture. When the departure procedure is not a part of the active flight plan, use HDG SEL or VOR LOC mode. When an immediate turn after takeoff is necessary, the desired heading may be preset before takeoff.
Note:  For all airplanes equipped with the HDG SEL takeoff option, leave runway heading selected until turn initiation.
737-300 - 737-500 Navaids and appropriate radials or tracks required for use during the departure may be displayed on the navigation display (as installed) using the FIX page feature. Use of the NAV AID and WPT switches on the EFIS control panel (as installed) provides additional information on the map display.
737-600 - 737-900 Navaids and appropriate radials or tracks required for use during the departure may be displayed on the navigation display using the FIX page feature and/or VOR/ADF switches on the EFIS control panel. Use of the STA and WPT switches on the EFIS control panel provides additional information on the navigation display.

Autopilot Engagement
737-300 - 737-500 The autopilot is FAA certified to allow engagement at or above 1,000 feet AGL after takeoff. Other regulations or airline operating directives may specify a different minimum altitude. The airplane should be in trim, and the flight director commands should be satisfied before autopilot engagement. This prevents unwanted changes from the desired flight path during autopilot engagement.
Copyright . The Boeing Company. See title page for details.
3.28  FCT 737 (TM) October 31, 2006
737 Flight Crew Training  Manual
737-600 - 737-900 The autopilot is FAA certified to allow engagement at or above 400 feet AGL after takeoff. Other regulations or airline operating directives may specify a different minimum altitude. The airplane should be in trim, and the flight director commands should be satisfied before autopilot engagement. This prevents unwanted changes from the desired flight path during autopilot engagement.

Flap Retraction Schedule
During training flights, 1,000 feet AFE is normally used as the acceleration height to initiate thrust reduction and flap retraction. For noise abatement considerations during line operations, thrust reduction typically occurs at approximately 1,500 feet AFE and acceleration typically occurs between 1,500 and 3,000 feet AFE, or as specified by individual airport noise abatement procedures.
At thrust reduction altitude, select or verify that climb thrust is set. At acceleration height, set flaps up maneuvering speed and retract flaps on the Flap Retraction Schedule.
Begin flap retraction at V2 + 15 knots, except for a flaps 1 takeoff. For a flaps 1 takeoff, begin flap retraction when reaching the flaps 1 maneuvering speed.
With airspeed increasing, subsequent flap retractions should be initiated: 737-300 - 737-500
.  
for airplanes with Mach/Airspeed indicators; when airspeed reaches the

fixed maneuvering speed for the existing flap position.
737-300 - 737-500

.  
for airplanes with speed tape; when airspeed reaches the maneuvering

speed “F” for the next flap position.
737-600 - 737-900

.  
when airspeed reaches the maneuvering speed (number) for the existing
flap position.

 

For flaps up maneuvering, maintain at least: 737-300 - 737-500
.  
flaps up maneuvering speed (Mach/Airspeed indicator airplanes)
737-300 - 737-500

.  
green “O” (speed tape airplanes)
737-600 - 737-900

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