Adverse Weather Conditions
Before Taxi Procedure
Do the normal Before Taxi Procedure with the following modifications:
GENERATOR 1 and 2 switches ........................................................ ON
Normally the IDG’s will stabilize within one minute, although due to cold oil, up to five minutes may be needed to produce steady power.
Flight controls ............................................................ .................... Check
An increase in control forces can be expected at low temperatures.
In freezing conditions:
CAUTION: The flap position indicator and the leading edge devices annunciator panel should be closely observed for positive movement. If the flaps should stop, the flap lever should be placed immediately in the same position as indicated.
Flaps ............................................................ .............................. Check
Move the flaps from Flaps Up to Flaps 40 back to Flaps up (i.e., full travel) to ensure freedom of movement.
If remote de-icing is planned or if the taxi route is through slush or standing water in freezing conditions, or if precipitation is falling in freezing conditions, taxi out with the flaps up. Taxiing with the flaps extended subjects the flaps and flap drives to contamination. Leading edge devices are also susceptible to slush accumulations.
Flap lever ................................................. Set takeoff flaps, as needed