Condition: Landing gear LEVER fails to move up when selected (stuck)

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Caution: In combination with an engine failure on takeoff, if obstacle clearance becomes a factor, consider pulling the Landing Gear override by Memory!

If the configuration warning horn sounds after flap retraction, indicates dual Air/Ground sensor failure.

•  Autothrottle remains in [THR HOLD]

• No wind indication on the ND

• Takeoff speeds on FMC's takeoff page will not clear

• The airplane will not pressurize

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Training notes: If you had paid attention on takeoffs, you can hear the solenoid lock releasing after decompression of the landing gear struts. If you do not hear this "click," suspect a dual Air/Ground sensor failure.