So I bought three '76 Lances, as a package. Sold off two of em, kept one. During the customer prebuy, we found that one of the planes gear would leak down, when up on jacks (gear up) for any length of time. Problem was the same component you're looking at, the power pack. If the red in transit light keeps cycling in flight, that indicates that either the power Pack is leaking internally, or there's a leak in the plumbing, or one of the actuators. The power pack seals go bad after around 15 years, or so. Cost of overhaul is around $5000, as was the case here. The gear operates as follows: The power pack pressurizes the the up side of the retract cylinders, the at end of cycle 1000 psi of trapped pressure keeps the gear up...there's no uplocks. When you select gear down, the trapped pressure is released, and the power pack ports pressure to the down side of actuators. In an emegency extension, as you've read in the P.O.H., you manually release up pressure, and the gear free falls . BTW, I completely agree with your spares trip kit. One more thing...if you want to extend your battery life, put the battery on a maintenance charge for 24 to 48 hours, every couple of months. That will drive the lead sulphate back into solution (H2SO4 + Lead back to the plates). As you know, battery is adjacent to the gear power pack. You'll get 6+ years of service, vs.4.
@sixtiesjunky3312 Thanks for all the feedback! I love learning! Fortunately, I've been able to find overhauled powerpacks for about 3700 but I have some time so I'll be sending mine out to be overhauled which will save me a few hundred dollars.
Often times it's the brushes in the LDG motor. I once got some brushes at the local hardware store that lasted for a half dozen landings before they were shot too.
@@nwsunsetpilot yessir we live in Ridgefield and our RV9A is hangered at KSPB (the only place I could find a hanger) 😀 You ever get together with the group at Pearson on Thursday evenings at Ed’s hanger? They are a fantastic group!
Well that sucks. Sorry to hear your trip is off. Hope you find parts quickly. At least your home and have resources to deal with things. Breaking down in some random small place would have not been fun. Be safe.
Just make sure you dont operate the aircraft in that "altered" seating configuration/sleeping arrangement. You might need some approved data for that there young fella. I recommend you look into it.
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So I bought three '76 Lances, as a package. Sold off two of em, kept one. During the customer prebuy, we found that one of the planes gear would leak down, when up on jacks (gear up) for any length of time. Problem was the same component you're looking at, the power pack. If the red in transit light keeps cycling in flight, that indicates that either the power Pack is leaking internally, or there's a leak in the plumbing, or one of the actuators. The power pack seals go bad after around 15 years, or so. Cost of overhaul is around $5000, as was the case here. The gear operates as follows: The power pack pressurizes the the up side of the retract cylinders, the at end of cycle 1000 psi of trapped pressure keeps the gear up...there's no uplocks. When you select gear down, the trapped pressure is released, and the power pack ports pressure to the down side of actuators. In an emegency extension, as you've read in the P.O.H., you manually release up pressure, and the gear free falls .
BTW, I completely agree with your spares trip kit. One more thing...if you want to extend your battery life, put the battery on a maintenance charge for 24 to 48 hours, every couple of months. That will drive the lead sulphate back into solution (H2SO4 + Lead back to the plates). As you know, battery is adjacent to the gear power pack. You'll get 6+ years of service, vs.4.
@sixtiesjunky3312 Thanks for all the feedback! I love learning! Fortunately, I've been able to find overhauled powerpacks for about 3700 but I have some time so I'll be sending mine out to be overhauled which will save me a few hundred dollars.
Often times it's the brushes in the LDG motor. I once got some brushes at the local hardware store that lasted for a half dozen landings before they were shot too.
@michaelsamson3276 I'm pretty confident it's the brushes but being it's not experimental so my hands are tied on the repair options 😞
@@nwsunsetpilot It wasn't a homebuilt for me either, the plane was stuck in a small town so I did what I needed to do to get it home.
@@michaelsamson3276 That seems reasonable!
Sorry you missed the trip buddy but great job on executing precaution and a safe landing.
I did my training out of KVUO last year : )
@@nathanmcguire1449 thanks! Are you still in the Vancouver area?
@@nwsunsetpilot yessir we live in Ridgefield and our RV9A is hangered at KSPB (the only place I could find a hanger) 😀
You ever get together with the group at Pearson on Thursday evenings at Ed’s hanger? They are a fantastic group!
@@nathanmcguire1449awesome! I haven't made it to his hangar nights yet. I need to.
Well that sucks. Sorry to hear your trip is off. Hope you find parts quickly. At least your home and have resources to deal with things. Breaking down in some random small place would have not been fun. Be safe.
@@roybutler9455 Indeed! I'm thankful we didn't end up stranded.
@@nwsunsetpilot I would have came and got you anytime anywhere
Just make sure you dont operate the aircraft in that "altered" seating configuration/sleeping arrangement. You might need some approved data for that there young fella. I recommend you look into it.
@bigclosetmusic4925 it's all signed off by an IA with a new weight and balance. Thanks for looking out 🙌
@@nwsunsetpilot interesting