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Right main gear delayed green

When extending my gear in a V35B the nose wheel and left main are down and locked in 3 seconds and showing green. The right main has a delay of an additional 10 seconds before it confirms a green light. I will have my mechanic swing the gear before my next flight but pointing him in a direction might help. The plane has not flown in 90 days due to maint issues and it did it on both the test flight and a second flight.

Model: Bonanza B35
Posted 10/20/2023 - 4 months ago
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Sounds like the right main down limit switch took on a little moisture / corrosion. These are supposedly sealed. You may be able to bring it back to life on jacks by releasing the tension and saturating it with LPS1 or corrosion-X and cycling repeatedly with thumb pressure. (When working in the gear well, remind your mechanic to pull both the motor and relay circuit breakers, not just shut off the master; as you noted, the 24-volt gear is rather swift in cycle.) Note the final ground for all three lights comes from a limit switch at the transmission / actuator, so while actuating the right limit switch, do not expect the light to be on and off.

Mike
ABS Technical Advisor

Posted 10/20/2023 - 4 months ago
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In reply to: Michael E. Thompson | 10/20/2023 - 4 months ago

Sounds like the right main down limit switch took on a little moisture / corrosion. These are supposedly sealed. You may be able to bring it back to life on jacks by releasing the tension and saturating it with LPS1 or corrosion-X and cycling repeatedly with thumb pressure. (When working in the gear well, remind your mechanic to pull both the motor and relay circuit breakers, not just shut off the master; as you noted, the 24-volt gear is rather swift in cycle.) Note the final ground for all three lights comes from a limit switch at the transmission / actuator, so while actuating the right limit switch, do not expect the light to be on and off.

Mike
ABS Technical Advisor

Mike,
This is great, thank you!!

Posted 10/21/2023 - 4 months ago
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Mine had a big spider nest in the safety switch.

IMG_2092.jpeg - 1.4 MB

Posted 10/21/2023 - 4 months ago
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Figured it: Since my original post I lubed switches as recommended and more trouble shooting. I noticed I could get the bulb to light after I removed the lens cover and pushed on the bulb with my finger. After inspecting the bulbs the base seemed flattened or worn. I replaced all four lights and all is normal. See pics.

IMG_7369.jpeg - 79.8 KB

Posted 10/31/2023 - 3 months ago
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I should have mentioned that the bulb on the left is the worn one, the unit on the right is a new one order from Aircraft Spruce.

Posted 10/31/2023 - 3 months ago
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Right main gear delayed green