How do you practice your 90-day currency?

[cessnadriver]

Frank Benvin. Do you really use auto transmission fluid for your aircraft???
Please tell me you are kidding! MIL-H-5606 is the REQUIRED hydraulic fluid for our Skymasters. I know that it's more expensive. But food for thought- If your have hull insurance and have an accident with the gear, they may not pay up due the use of unauthorized/unapproved maintenance?
Just a thought!
Regards,
BILLS '65 C337 owner, pilot and A&P

[Frank Benvin]

Cessnadriver - I only use MIL-PRF-5606H - ROYCO 756 in my 1967 337b which is specified for it

I was quoting mshac he said to use jack fluid or transmission fluid. I was stating that it might not be compatible and hurt the seals and o-rings causing a gear failure or also a brake failure. Brakes and gear use the same oil

[Learjetter]

I leave the gear down when doing multiple VFR patterns, after the first touch-n-go. It was standard procedure in the C-130, so I’ve made it my SOP in my airplane. I raise the gear in VFR patterns on the initial TO, and when I go out to initial for the overhead.

[n86121]

On hydraulic system gear,
While taxiing, or on ground, cycle gear handle to DOWN.
Then observe how many seconds it takes to return to locked down position.

When you cycle gear handle down, it goes through full cycle.
Pressurized system
Triggers various mysterious cycling valves
Then when it hits as I recall 1200 or 1500 psi, it pops up back to gear down position.

If warm out, will cycle in 3-5 secs
If fluid is low, (or very very cold) will take more than 10 secs to pop back
If in doubt, do it again. No extra charge.
If any leaks, it will take even longer (or not at all).

All while safely on the ground!

I keep a gal of the right stuff in my tie down box
As well as squatter can.
Every so often just top off reservoir

NOTE:

Whenever the system is opened for any maintenance
Cycle the gear a bunch of times - in air or on jacks
Top off
Cycle a bunch more times
Top off

Wash rinse and repeat until it stops needing any more.

[CO_Skymaster]

Thanks everyone for the replays. I was trusting that the gear would cycle once in the air, but I'm glad to see there are other options to test the gear or see the hydraulic fluid levels before flight. This is good information.

[mshac]

FYI: The information the Big Cheese from DC posted two entries before this is only correct for those Skymasters with the engine driven hydraulic system. Those of us with the later model Skymasters with the electro hydraulic system do not use this test.

[patrolpilot]

Originally Posted by Learjetter

I leave the gear down when making multiple VFR patterns after the first touch-n-go.

Same as I, LRJTR. I've never needed the currency, so I'm not in the pattern much except for night in the summer months. I leave it down because I can leave my electrical-driven air conditioner on. Yeah, it is still in the 90s here at night!

By all means, if a pilot needed the landing currency, I would say the best course is to do it all, as you need the procedure currency as well. But, on the other hand, as a CFI working with a pilot, and I'm confident that the after-takeoff and before-landing procedure is solid, I'm good if the gear stays in place. However, I want to see the before landing checklist performed and verbalized, not skipped.

Being a CFI involved with the Skymaster, I would like to add please ensure you are proficient in maneuvering the airplane at low altitude with the gear extended. There are a lot of circumstances that can put you in this configuration.

Also, practice manual gear extensions; it is a considerable distraction as it will put you "heads down" with your hand off the throttles. This is a perfect setup for an approach to a stall or whacking another airplane. Pilots seem to want to blow through this, but it takes some airspace to complete. Of course, you will want to exit any traffic pattern. I have yet to see a pilot that can lean down to reach the handle and still see over the glareshield. I suggest configuring the items per the checklist: look out, ten pumps, look out/adjust power, ten pumps, look out/adjust power, and repeat. This is important for a stable airspeed and maintaining level flight while looking for traffic. Flying the aircraft always comes first. This is a good example of the need to be familiar with flight in the traffic pattern with the gear down.