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« Last post by michelvsr on Fri, 15 Jan 2021 20:11 »
Hi again Jean-Philippe,
For the scenario 2, the 2 phases are made at the same place, special area or gate.
For the de-icing with engines running, there is a special check-list to prepare the operation. Here a part of this Air France checklist
CAUTION:Operate the APU during de-icing only if necessary. If
the APU is running, ingestion of de-icing fluid causes
objectionable fumes and odors to enter the airplane.
Ingestion of snow, slush, ice, or de-icing/anti-icing
fluid can also damage to the APU.
If de-icing / anti-icing is needed:
APU .................................................................As needed F/O
The APU should be shut down unless APU operation is
necessary.
Call “FLAPS UP”. C
Flaps.............................................................................UP F/O
Prevents ice and slush from accumulating in flap cavities during
de-icing.
Thrust levers ...............................................................Idle C
Reduces the possibility of injury to personnel at inlet or exhaust
area.
PACK control selectors..............................................OFF F/O
Reduces the possibility of fumes entering the air conditioning
system.
Wait approximately 10 seconds after pack switches are off before
positioning bleed switches to off to reduce pack wear.
ENGINE BLEED air switches (engines running) OFF F/O
Reduces the possibility of fumes entering the air conditioning
system.
APU bleed air switch (APU running)...................OFF F/O
Reduces the possibility of fumes entering the air conditioning
system.
After de-icing / anti-icing is completed:
APU ............................................................As needed F/O
APU bleed air switch (APU running)....................ON F/O
ENGINE BLEED air switches ..............................ON F/O
Wait approximately one minute after de-icing is completed to turn
pack selectors on to ensure all de-icing fluid has been cleared from
the engines.
PACK control selectors ................................... NORM F/O
Have a nice evening.
Michel.