737 Operations Manual
Non-Normal Checklists -
Anti-Ice, Rain
Copyright © The Boeing Company. See title page for details.
D6-27370-400E-TBCE NNC.3.1
NNC.3 Non-Normal Checklists-Anti-Ice, Rain
ENGINE COWL ANTI-ICE
Condition: An engine COWL ANTI-ICE light illuminated indicates
an overtemperature or overpressure condition in the
cowl anti-ice duct.
Flight conditions permitting:
THRUST LEVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . RETARD
Reduce thrust until the COWL ANTI-ICE light
extinguishes.
AUTOTHROTTLE (If engaged) . . . . . . . . . . . . .DISENGAGE
[Prevents undesired autothrottle activity.]
ENGINE COWL VALVE OPEN
Condition: An engine COWL VALVE OPEN light remaining
illuminated bright blue in flight indicates the cowl
anti-ice valve position disagrees with the engine
anti-ice switch position.
Valve Open:
If total air temperature is above 10°C, limit thrust on the
affected engine to 80% N1 if possible.
Valve Closed:
Avoid icing conditions.
PITOT STATIC HEAT MALFUNCTIONS
Condition: Pitot static light(s) illuminated indicate related pitot
static malfunction(s).
Avoid icing conditions.
Note: Flight in icing conditions may result in erroneous
flight instrument indications.
December 1, 2000
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