Term
There are _____ temperature zones.
___upper, ____main and _____lower |
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Definition
7
Forward and upper deck, crew rest, forward and aft main and lower gargo |
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Term
| The temperatures are set for the zones with the ____ numbers and the _____numbers indicate actual setting |
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Definition
| Magenta are set temp, white are actual |
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Term
| Pack ____ is for forward lower cargo and pack ____ is for aft lower cargo |
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Definition
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Term
Lower Lobe Cargo Conditioned Air Flow Rate (LCFR) knob
Hi or Both = ___ packs ___ flow
FWD LOW = Pack ____ goes to ___ flow
AFT LOW = Pack ____ goes to ___ flow |
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Definition
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Term
| Lower Lobe Temp Controllers are active when______ |
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Definition
| Selected by the LCFR switch |
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Term
| The flight deck fan is available ____ and it increases flow of ____ air when at least _____. |
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Definition
ground
conditioned
one pack is on.
No packs on? Supplies recirculated air.
BCF fan works in flight if wshld air on |
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Term
| When Cargo Fire Arm Sw is pushed, the following happens: |
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Definition
| Two packs and airflow to cargo compartments are shut off and equipment cooling configures to closed loop |
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Term
| When power is initially applied to the airplane, the upper deck zone target temp is ___ |
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Definition
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Term
| FLT deck zone temperature knob range ____ |
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Definition
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Term
| Main & Lower deck zone temperature knob range _____ |
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Definition
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Term
| How is the forward cargo compartment heated? |
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Definition
| When the equipment cooling system inboard exhaust valve is open, the heated air from the E&E compartment heats the forward cargo compartment |
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Term
| How is aft cargo heat provided? |
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Definition
| Bleed air from the center section of the bleed air duct. |
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Term
| On the ground (engines off, sw in NORM), equipment cooling ducts warm exhaust air ______. At lower temperatures the valve _____ and the system configures for ____ |
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Definition
overboard through the ground exhaust valve
closes, flight |
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Term
| On ground, one or more engines running on each wing, equipment cooling _____. Cooling selector to STBY does what? |
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Definition
-configures for flight (closes GEV) to allow pressurization.
-closes overboard exhaust valve to manually configure for flight |
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Term
Temp selected <50 & LCCFR in FWD LOW, BOTH LOW, or FWD HIGH, the ____ is closed and cooling air is _____.
With higher selected temps, or all other positions of ______, the _____ is open and warm equip cooling air discharges into____ |
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Definition
-Inboard Exhaust Valve (IEV)
-configured for closed loop mode.
-LCCFR Switch
-IEV
-the forward cargo compartment |
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Term
| What is there to prevent over pressurization of the airplane? |
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Definition
| Two mechanical positive pressure relief valves. Pack two can shut down to assist |
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Term
| What happens when airplane cabin pressure is slightly less than ambient? |
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Definition
| Negative pressure relief valves in the side cargo door and forward and aft cargo doors open. |
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Term
| What does pushing the zone reset switch do? |
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Definition
-It resets temp zone control if fault gone
If a duct overheat no longer exits, it
-Reopens master trim air valve
-Reopens fwd or aft lower lobe cargo trim air s/o valve |
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Term
| What could cause a zone sys fault light? |
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Definition
Master trim air valve failed closed
Master trim air valve closed and pack air continues to flow
Trim air switch off
Temp zone duct ovht or zone temp cntrlr fault has occurred |
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Term
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Definition
-Master trim air valve closed
-Pack output temp in b/u mode... temp set from 65 to 85 per Flt Deck Temp in AUTO
-Pack controller A selected and B inhibited, unless A has failed. |
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