337B gear doors not closing in flight
Ref: 1967 337B skymaster . This is an intermittant problem. Gear works fine for a year then back to the old problem.
Upon gear retraction, in flight, the amber gear up light will come on momentarily then go out. The handle remains in the up position and has to be manually returned to neutral. The doors stay partially open. No problem on gear down cycle. I don't have this problem when jacked up and mule is used. I've checked the two main gear uplock switches and they are good. The nose uplock switch is a pain to get at so haven't varified it yet. My guess, after a lot of thought, is the nose gear uplock switch being intermittant. I checked rigging and good contact with switch.
Any Ideas ??????????
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