[Learjetter]

Gear falls fairly evenly and all the locks click solidly. Less than 1-2 seconds between L and R gear locking down. I’ll add one more symptom I just remembered.

After flight Saturday AM, I towed the airplane and put it in the hangar. Several hours later I turned on the master switch to close cowl flaps, and immediately noticed the gear warning horn ON, and no green light.

I stood dumbfounded for 5 seconds then horn quit and green light came on. Pump never turned on.

External power source is either a 24v 20A power supply, or a 24v truck starter unit powered by capacitors. Both work OK to ensure solid 24v with plenty of amps is available to pump. I think.

UPDATE: smoking gun found! Went to airport today and by chance a couple buddies showed up. With all three of us, we jacked her up and ran the gear. Once retracted, I check F and R throttle switches and R throttle switch did NOT set off horn. Then we put the gear down and all gear went down but no green light and HYD pump continued to run. We then tested each gear downlock switch and found L MAIN gear down micro switch (S2088-1) intermittent and then it failed completely showing some 800+ ohms when closed.

Textron has switches in stock ($200 ea). Those little switches are quite fiddly to get out.

Plan is to replace bad switch, check function, and then fly a couple trips. Over the holidays I’m gonna tackle rebuilding every hydraulic cylinder in the system and probably replace hoses (quote from PHT was $1400 for all hoses). Next year, I’ll tackle th power pack itself.

Update 2: installed S2088-1 downlock switch, swung gear a few times, no defects noted.