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Procedure...
Let's go through this one more time... and this is a procedure I use on the ground during pre-flight. You DO NOT move the Landing Gear selector handle... it stays in the down & locked position with the green light.
When you enter the cabin to check fuel gage indications, the moment you hit the master switch -- assuming the LDG GEAR MOTOR circuit breaker is pushed-in -- you should hear a quick "Zzziip" of the power pack as it repressurizes from any leakdown over a few days or if temps have dropped. This tells you the powerpack motor is functioning and that it is pressurizing the system. At this time you can also check the landing gear lights with push-to-test and on the gear-down-green light, you should also get the unsafe horn when pressing. Now, turn the master off momentarily and then recycle it to the 'ON' position again... and this time listen for the audible 'thump' of the solenoid shuttle valve in the powerpack.
OK, now turn the master switch 'OFF', pull-out the LDG GEAR MOTOR circuit breaker, then extend the emergency gear handle on the floor and pump down the doors. After completing an inspection of the actuators, hoses and anything else you might want to check in the undercarriage... and maybe even reaching through a hole on the left bottom side of the fuselage with your index finger just aft of the left main gear so as to feel for any fluid leaks/seeps along the rod and after lower part of the door actuator... go back to the cockpit and with the LDG GEAR MOTOR circuit breaker still in the pulled-out position, throw the master switch to the "ON" position and then using the emergency gear handle, pump the doors shut until resistance is felt. Stow the handle. Now, push-in the LDG GEAR MOTOR circuit breaker while the master switch is still on. If the emergencr gear handle properly re-pressurized the system, the power pack should remain silent when you push the circuit breaker back in. But if you didn't give it enough pumps on the handle, it could give a quick "Zzziip" as the powerpack brings it back to near 1500 PSI, or so.
Hopefully this detailed explanation will have clarified things. I usually use a clean paper towel around all of the accessible rods on the actuators, so if there's any 5606 juice, it will show red... and it keeps the fingers clean.
Also, while you're doing this routine, it's a good time to swipe a little 5606 on the nose gear strut to keep it clean and lubed... the seals will like you.
SkyKing
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