737 MAX Flight Crew Operations Manual
Anti-Ice, Rain -
Controls and Indicators
3.10.6
MN-FLT-OH-201
ON (on the ground) –
• wing anti–ice control valves open if thrust on both engines is below
takeoff warning setting and temperature inside both distribution ducts is
below thermal switch activation temperature
• control valves close if either engine thrust is above takeoff warning
setting or thermal switch is activated in either distribution duct. Switch
remains ON
• switch trips OFF at lift–off.
March 1, 2021