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inconsistent gear up sector clearance

After a few days of troubleshooting and talking with some experts, the gear motor has been overhauled and re-installed. I tried to get two different places to bench check the relay for me, and both said they could but long story short, both were untruthful. One of those places did the motor overhaul and it was a terrible experience, especially for it being a well known shop. Everything is back in. I'm ops checking the system with 28.5 volts. My gear down sector clearance usually varies between 5/8 and 3/4 (white box). The gear up sector clearance is pretty much always 1/4 to no clearance. After it hits the up switch, it just keeps on going. Checked grounds and all is good. No matter where I set the up switch to make contact, it always stops to late. Any ideas???

Maybe after this issue is fixed, it will help my other issue of the gear up-lock cable catching on the greaseable roller grease fitting. Feel free to ask about that as well.

Thanks

Seth

Model: Baron 95-B55
Aircraft Serial Number: TC2131
Posted 11/27/2023 - 3 months ago
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The first thing to note is the gearbox travel is not based on the color of the box. The travel is based on the serial number of the aircraft, for your S/N TC2131 the travel is set at 1/8-1/4 of a turn remaining. After TC 2414 the travel is 5/8-3/4 of a turn.
On the relay there is a rocker switch on the forward side that provides the ground for the dynamic brake, if the points are dirty, it will cause the issue. In addition make sure that the wire from the ground stud on the relay to the mounting point is removed and cleaned then reinstalled. Make sure both ends are secure before attaching the ground wire from the motor to the relay.
If it was doing this before the motor overhaul then I suspect a bad ground or a failing switch.
If you would like to give me a call we can discuss in more detail. 316-945-1700

Bob Ripley
ABS Technical Advisor

Posted 11/27/2023 - 3 months ago
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So for future reference, I should ignore the highlighted text from the ABS Landing Gear Inspection Checklist and Guide? Strictly go by serial number? And as far as the relay goes, something is certainly not right. I would like to make a request to have someone knowledgeable go through this relay and clean/fix whatever is needed. I've been trying to do this for months now but nobody seems capable or interested. Is there anyone that can do this?

Thanks

Seth

PXL_20231127_162011756.jpg - 1.5 MB

Posted 11/27/2023 - 3 months ago
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The points on the forward side of the relay can be cleaned with some VERY fine grit emery paper so the points get a good ground. As long as the gear is going up and down that would indicate that the relay is operating correctly.

Bob Ripley
ABS Technical Advisor

Posted 11/27/2023 - 3 months ago
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inconsistent gear up sector clearance