Term
| How many Hydraulic System Controllers(HSC) are there? |
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Definition
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Term
| What is the normal operating pressure of the hydraulic systems? |
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Definition
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Term
| How many hydraulic pumps are associated with the hydraulic system? |
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Definition
13. 4 Primary and 4 secondary engine driven pumps,
4 Aux AC electrically driven pumps
1 xfer pump that transfers pressure between #2 and #3 system. |
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Term
| In AUTO mode, at what pressure do your secondary pumps come on to help the primary pumps? |
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Definition
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Term
| in AUTO mode, once your secondary pumps have had to come on to help the primarys with pressure what PSI do they shut off once they've reached? |
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Definition
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Term
| At what pressure does the PRESS AVAIL light come on at the LACP? At what pressure does it extinguish? |
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Definition
comes on at 2700 PSI
extinguishes once pressure drops below 2200 PSI |
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Term
| At what temperature do the AUX pumps shut down? |
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Definition
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Term
What two things auto shutdown the Aux pumps?
What are two reasons the AUX pumps auto shut down? |
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Definition
temperature at 135 degrees C
or fluid quantity drops below 0.4 gallons |
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Term
| How do you override an auto shutdown of #2 or #3 AUX pump? |
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Definition
| Hold pump switch for more than 5 seconds, continue holding while operating door |
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Term
| Where is the transfer pump located? |
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Definition
| Right aft main landing gear pod |
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Term
| Where is the RAT and what does it do? |
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Definition
| Forward right main landing gear pod. It's deployed to provide hydraulic pressure in the case of a 4 engine flameout |
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Term
| Name some components that are run off the #2 hydraulic system. |
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Definition
primary system for brakes
left air deflector
cargo door and ramp
stabilizer struts |
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Term
| name some components run off the #3 hydraulic system. |
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Definition
back up system for brakes
right air deflector
cargo winch
landing gear |
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Term
| Where is the #2 aux pump located? |
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Definition
| left aft main landing gear pod |
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Term
| Where is the #3 Aux pump located? |
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Definition
| in the aft right main landing gear pod |
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Term
| Where is the transfer pump located? |
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Definition
| Right aft main landing gear pod. |
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Term
| What are the normal pressurized reservoir fluid levels for each hydraulic system? |
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Definition
#1 7.2
#2 11.7
#3 7.4
#4 7.2 (gallons) |
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Term
| How are the HSC's powered? |
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Definition
| #1 is primary, electrical snd powered by battery bus. #2 is backup and powered by DC bus #3. |
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Term
| what is the #2 SYS EMERG BACKUP switch on the LACP for? |
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Definition
| it selects the AUX reservoir sump for the #2 system, provides backup hydraulic fluid in the event of loss of #2 fluid. |
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Term
| How does the #2 Aux reservoir sump get its fluid? |
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Definition
| It is maintained full by fluid in #2 system returning from the empennage. |
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Term
| What are cold weather procedures for the hydraulic sytems? |
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Definition
Below 15 degrees F alternate hydraulics on/off 30 second durations, max of 10 cycles until you reach 3500 PSI
under 45 degrees F use both AC packs to warm cargo box |
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