Term
| How many hydraulic pumps are there and how are they powered? |
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Definition
| 3 total, 2 engine driven and 1 electric auxiliary pump |
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Term
| What is the hydraulic system reservoir quantity? |
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Definition
| 1.9 gallons pressurized to 17 PSI to prevent foaming |
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Term
| What is the limitation on the use of the auxiliary hydraulic pump? |
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Definition
| 3 minutes continuous on and 20 minutes off |
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Term
| What is the consideration for the hydraulic system at OAT below -25 degrees C? |
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Definition
| Operate engines for three minutes to bring hydraulic system up to normal operating temperature |
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Term
| What indication would you have in the cockpit that one engine driven hydraulic pump has failed during flight? |
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Definition
| Possibly LOW HYD pressure light, if installed, during actuation of subsystems |
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Term
| What type of hydraulic fluid is used? |
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Definition
| MIL H 5606, mineral based and colored red |
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Term
| What is the normal hydraulic system pressure? |
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Definition
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Term
| What is the normal charge on the hydraulic accumulator? |
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Definition
| 750 psi minimum (850 psi recommended) with no hydraulic pressure on the system |
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Term
| Why does the reservoir plumbing for the engine driven pumps originate from the side and for the auxiliary pump from the bottom? |
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Definition
| To leave 0.4 gallons in the reservoir for the auxiliary pump in case of fluid loss |
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Term
| Why do you need a minimum of 1,800 psi of emergency air? |
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Definition
| To override hydraulic system pressure (specifically to move shuttle vlaves against 1,500 psi) in the event of electrical failure |
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Term
| What is the emergency air utilized for? |
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Definition
| Emergency extension of the landing gear and for emergency braking |
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Term
| With hydraulic pressure only from the auxiliary pump, which system should not be operated? |
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Definition
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