Supplementary Procedures -Anti–Ice, Rain 737 Flight Crew Operations Manual
Takeoff with light coatings of cold-soaked fuel frost, up to 1/8 inch (3 mm) in thickness on lower wing surfaces is allowable; however, all leading edge devices, all control surfaces, tab surfaces and balance panel cavities must be free of snow, frost or ice. If the frost on the lower surface is greater than 1/8 inch (3 mm) in thickness, all ice or frost on the wings must be removed using appropriate deicing/anti-icing procedures.
Takeoff with cold-soaked fuel frost on upper wing surfaces is not allowable. If any frost is present on the upper wing surface, all ice or frost on the wings must be removed using appropriate deicing/anti-icing procedures.
Copyright . The Boeing Company. See title page for details.
Supplementary Procedures -Anti–Ice, Rain 737 Flight Crew Operations Manual
Window Heat System Tests Overheat Test
The overheat test simulates an overheat condition to check the overheat warning function of the window heat system.
WINDOW HEAT switches ................................................................ ON
WINDOW HEAT TEST switch .................................................... OVHT OVERHEAT lights – On ON lights – Extinguish
Lights extinguish after approximately 1 minute.
MASTER CAUTION – On
ANTI–ICE system annunciator – On
WINDOW HEAT switches ............................................................. Reset Position the WINDOW HEAT switches OFF, then ON.
Power Test
The power test verifies operation of the window heat system. The test may be accomplished when any of the window heat ON lights are extinguished and the associated WINDOW HEAT switch is ON.
WINDOW HEAT switches ................................................................ ON Note: Do not perform the power test when all ON lights are illuminated
WINDOW HEAT TEST switch ...................................................... PWR The controller is forced to full power, bypassing normal temperature control. Overheat protection is still available. WINDOW HEAT ON lights ..................................................Illuminated If any ON light remains extinguished, the window heat system is inoperative. Observe the maximum airspeed limit of 250 kts below 10,000 feet.
Copyright . The Boeing Company. See title page for details.
737 Flight Crew Operations Manual
Level Change Climb/Descent
ALTITUDE selector ..................................................Set desired altitude Note: If a new MCP altitude is selected while in ALT ACQ, the AFDS engages in V/S and the existing vertical speed is maintained. LVL CHG switch ..............................................................................Push
Verify FMA display:
Thrust mode (climb) – N1
Thrust mode (descent) – RETARD then ARM
Pitch mode – MCP SPD
IAS/MACH Selector.....................................................Set desired speed
Vertical Speed (V/S) Climb/Descent
ALTITUDE selector ..................................................Set desired altitude Note: If a new MCP altitude is selected while in ALT ACQ, the AFDS engages in V/S and the existing vertical speed is maintained. V/S thumbwheel ..............................................Set desired vertical speed
Verify FMA display:
Thrust mode (climb or descent) – MCP SPD
Pitch mode – V/S
IAS/MACH Selector.....................................................Set desired speed To transition to the vertical speed mode from another engaged climb or descent mode: V/S mode switch .........................................................................Push V/S climb mode engages at existing V/S. V/S thumbwheel .........................................Set desired vertical speed
Copyright . The Boeing Company. See title page for details.
Supplementary Procedures -Automatic Flight 737 Flight Crew Operations Manual
Verify FMA display:
Thrust mode (climb or descent) – MCP SPD
Pitch mode – V/S
IAS/MACH Selector ............................................... Set desired speed
Temporary Level-Off during Climb or Descent (Not at FMC Cruise Altitude)
MCP altitude selector .................................................Set desired altitude YD651 - YD655 Observe VNAV ALT on flight mode annunciator as level-off is initiated. MCP N1 light will extinguish if leveling from a climb. N1 Limit changes to CRZ if leveling from a climb. To continue climb/descent: MCP altitude selector............................................Set desired altitude VNAV switch .............................................................................. Push Observe climb or descent initiated. Mode annunciations appear as initial climb or descent.
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