Gearbox oil level

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gcampbe2
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Gearbox oil level

Post by gcampbe2 »

I just got my DA40NG back from its first annual/100 hour maintenance, and one difference I have noted was that the gearbox oil window now shows no air bubble and is completely full. The gearbox oil has always previously been about 1/2 way up the little window previously, so obviously when the gearbox oil was replaced they must have added more than before. My question: Is there such a thing as overfilling the gearbox?
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chili4way
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Re: Gearbox oil level

Post by chili4way »

There certainly is such a thing, but not seeing a bubble is normal when the plane comes back from MX. If you had your plane serviced at a DASC (Diamond Authorized Service Center), it was almost certainly topped off to the correct level.
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ememic99
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Re: Gearbox oil level

Post by ememic99 »

I think it was changed few years ago to “no bubble”.
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gcampbe2
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Re: Gearbox oil level

Post by gcampbe2 »

Interestingly after a couple of flights there is now a tiny air bubble at the top of the gearbox window. This makes verifying there is gearbox oil much more simple.
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