I started having intermittent landing gear selector failure and had to use the Parker hand pump a couple of times. After reading the ICA (Instructions for Continuous Airworthiness) I removed the selector module. Using test leads and a multi-meter it was discovered that the relay wire slipped out of the cannon connection. I tightened the crimp and reinstalled the gold plated pin. Very solid and ready to cycle the gear with the electric pump.

(4) in the green.

Gear is working great now. (4) blue lights for water alighting, wheels up.

Thanks for the informative post.

Rather than start a new thread I thought I'd post the following photo and description of a problem I just encountered to see if you or any other amphib guys might have some ideas.



These are Aerocet 3400's. The gear operated normally, with four brown indicating gear down and locked (rather than green on this indicator: "Four in the brown, gear is down, landing on the ground!"). I landed uneventfully at my home airport (KMEV, Minden, NV), pushed the plane back into the hangar using the towbar and a four wheel ATV like I always do. The next day, I went out to the hangar and found the right main gear had folded.

Neither Aerocet engineers nor my local A&P can explain it. An inspection reveals nothing jammed in there. The hydraulic system checks out OK. They can find nothing to indicate anything is not airworthy, yet I'm a bit concerned. Either it never really went over center, or it did and somehow "popped" out of the over center position. There are springs that hold it in the over center position, like most retracts, so that even when the hydraulic pressure bleeds down over time, it can sit on the main gear indefinitely.

Any ideas? I've cycled the gear on blocks in the hangar and am planning on going out to tomorrow and doing a few landings. I hate to just chalk it up to a one time anomaly without understanding the why and how.

Pierre

Pierre,

I don't want to sound overly suspicious but, that is very unusual. You may want to run an SDR (Service Discrepancy Report). I would not call it case closed at this point.

Aerocet can come up with a definitive explanation I am sure.