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What is required for the Saab to be dispatch into known icing conditions
All ice protection systems must be operable
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Can the Saab be dispatched into icing conditions with side windshield inop
Yes, if only one side window heat is INOP there is MEL relief
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Which electrical ice protection system is NOT powered by the AC Generator
Standcy Pitot heat
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What powers the Standby Pitot heat
Right Essential Bus
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How long does it take for the standby pitot to reach full operating temperature
At least 5 minutes
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What is powered automatically when the 1st AC GEN comes online
Main Pitot tubes, temp probe, AOA vanes
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What is the power source for the OAT probe
115 V AC generator
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Is there a pilot controlled switch for the OAT probe
No
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When is the OAT probe heated
From the time the gear is retracted till landing
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When is power supplied to the AOA vanes for heating
As soon as an AC generator is online
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What is the power source for the windshield heat
115 Volt "wild" frequency bus
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What powers the 115 Volt "wild" frequency bus
AC Generator
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What is the time limit for side windshield heating
Operate in NORM for 7 minuts before selcting HIGH
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What is indicated by an illuminated L/R SIDE or L/R FRONT lights
Either an overheated windshield or a controller fault
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If power is interrupted to a windshield causing a FRONT/SIDE light to illuminate, will the light extinguish when power is restored
No, the switch must be turned off and then back on again to reset the system
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What does the AIR SUPPLY switch control
Controls a shut off valve to allow bleed air to the boot system
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What stage does the beeld air for engine anti-ice come from
5th stage
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When deflated what holds the boots "down" tight to the wing
Vacujm pressure
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What items use Bleed Air for Ice protection
Boot De-Icing, Engine split lip, engine guide vanes
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What order are the boots cycled in one cycle
Stab, outboard wing, inboard wing, stab
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Will the deice boots inflate with both bleed valves closed
Yes
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Will boots inflate with H/P valves closed
Yes
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Can boot inflation be monitored
Yes, by watching the boot indicator lights
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How often are the boots cycled when operating in "CONT"
Every 3 minutes
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Does the CWP ICE PROT light illuminate with all the icing systems
Yes
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What is indicated by an illuminated DE-ICE OV TEMP light
An over temperature has been noted in the boot system (Over 150C)
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What is indicated by an illuminated TIMER light
The de-ice timer valves are malfuctioning
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Can the pilot manually de-ice just the wings
yes
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Can the pilot manually de-ice just the stabalizer
Yes
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How can the pilot de-ice just the outboard wing section
By pressing and holding the outboard push button for 6 seconds
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Why are HP valves kept in AUTO during flight in icing conditions
To ensure proper boot inflation at low power settings
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What is indicated by an illuminated blue ENG ANTI-ICE light on the status panel
The associated Engine Intake switch is on
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Does the blue ENG ANTI-ICE status panel extinguish with a failure of the Intake heat
No
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Which light on the staus panel does NOT indicate system working properly
ENG ANTI-ICE
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Which ice protection system can not be trasferred to the opposite side AC GEN
Engine intake heat
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How is the inlet lip heatedÂ
Electrically
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How are the inlet frame vanes heated
Engine oil
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How is the splitter lip and guide vanes heated
Bleed air
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What controls bleed air to the splitter lip and guide vanes
Anti-Ice start bleed valve (AISBV)
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What is indicated by an illuminated L AIR VALVE light
Associated Air valve is not positioned properly
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What is indicated by an illuminated INTAKE light
Intake heat has failed or lost one or more phases
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Is prop ice protection used as a de-ice or anti-ice system
De-Ice
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When is Prop De-Ice turned on
When ice accretion is observed and SAT is -5C or colder
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What temperatures is NORM used for prop de-ice
-5C to 12C
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At what temperature does prop de-ice switch to MAX
Colder than -12C with ice accretion
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Why is it important to operate the props only after ice accretion
To avoid "run back" ice
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What is "run back" ice
Ice that melts and refreezes on the unheated section
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How much thrust is lost with "run back" ice on the props
Up to 30 percent of thrust
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Can the MAX mode be used between temperatures of -5C and -12C
Yes if the propeller vibrations occur MAX can be used up to -10C until vibrations dissipate
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What is the procedure for switching from NORM to MAX on prop heat
Turn switch off before switching to MAX to avoid nuisance cautions
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Which Ice protection systems have a Flight Status panel light
Prop De-Ice, and Engine Intake
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What does an illuminated blue PROP DE-ICE light on the status panel indicate
Prop de-ice is on and working properly
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What is the difference between the Engine and Prop status panel lights
Engine indicated on only and the prop indicates on and working
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What is indictated by an illuminated L AC GEN light
Left AC GEN is not supplying power
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What is indicated if a PROP DE-ICE status light is extinguished
Either the switch is turned off or the system malfunctioned
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What are the cycle times in NORM for Prop De-Ice
- 11 seconds on
- 79 seconds off
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What are the cycle times in MAX for Prop De-Ice
- 90 seconds on
- 90 seconds offÂ
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What is indicated with an illuminated PROP light on the overhead panel
Associated prop de-ice system is malfunctioning
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What is indicated by an illuminated STBY PITOT light
Standby pitot is not powered
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What is the purpose of the Park system on the windshield wiper
To return the wiper to the stowed position
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