Cold Weather Operations Flashcards
Anti-ice usage is considered by dispatch in flight planing for departure, enroute, and arrival based on ___________ weather
Forecast
Captain and dispatcher share a joint responsibility to consider application of _________________ penalties.
Wing anti-ice
Ice accumulation on unheated tail surfaces and wing surfaces inside of the engines may not melt before landing when destination temperature is below _________.
10 C
Oil pressure must be in the ___________ range before takeoff. Oil temperatures must be at or above __________ c to provide adequate heat for fuel deicing during takeoff.
Normal
50C
Engine anti-ice must be selected on during ground operations when outside air temperature is _________ or below and visible moisture is present
10c
To avoid losing lateral control on a slippery surface, both engines should be run-up together
N/A
Single engine taxi is authorized as long as taxi surface is not slippery and there is no risk of ice forming on the number 2 engine nacelle or sensor probe.
N/A
If engine anti-ice is selected on and the fault light remains illuminated, indicating the valve did not open, increase N2 by 5% on the associated engine.
N/A
On slippery surfaces, the use of the parking brake for engine run-ups is not recommended.
N/A
Differential braking is only available with the brakes released. The parking brake is not recommended, because when set, it is difficult to retard thrust to idle and release the parking brake in a timely manner.
N/A
Differential braking can be more effective than nose wheel steering during slippery conditions
N/A
Periodic engine run-ups are important even though engine anti-ice is on. The purpose is to shed ice before it accumulates to a point where it could do damage to the engine when ice sheds.
Ice may build up on engines while there appears to be no visible accumulation on other aircraft surfaces. This is due to a temp drop as ambient air enters the engine inlet.
N/A
When engine anti-ice is on, perform an engine run-up to a minimum of __________ % N1. Ice shedding is dependent on air loads which in turn are dependent on rotor speed.
50%
Brakes should be held _______________ during engine run-ups
Manually
During engine run-ups both engines should be run-up together to keep symmetrical thrust
N/A
The first engine run-up should be done as soon as ___________ but not more than ______________ minutes.
Practical
10 minutes
Additional run-ups should be preformed at intervals no greater than ___________ minutes.
10 minutes
Direct ground crews to remove low and high pressure air before selecting the DITCHING switch ON to prevent over pressurization of the cabin.
N/A
Do not select the APU BLEED switch ON until at least _______ minutes after the completion of deicing.
2 minutes
Do not use APU bleed air for the PACKS until ________ minutes after deicing is complete. A/C smoke and fumes may result.
5 minutes
After deicing in moderate to heavy freezing precipitation, every attempt should be made to keep both engines running continuously with engine anti-ice on.
N/A
