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- Feb 15, 2012
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The news is not good. In doing some more diagnostic work on the power hiccup I have been having, we noticed some oil leaking from the mag. This is new.
Took it off, and one of the Stop Pins on this dual mag is missing! #&^@*&^*&##
That is why the oil is leaking, there is a big hole. The stop pin fell into the engine, hopefully cleanly into the oil pan.
But, any way you slice this, this is going to cost money, maybe some, maybe a lot. Perhaps the least of it, but the mag cannot be field repaired, it will need a replacement case.
We already examined the mag sprocket, it looks undamaged. Borescoped into the mag opening, and nothing to see.
Pulled the oil filter, it looks clean, no metal. Will have a look at the screen tomorrow. Oil sample pulled for analysis.
If we are very lucky, the pin will fall out when we remove the drain plug, or maybe fiddle around with a magnet. Pushing a borescope up might visualize it. Otherwise it will mean pulling the oil pan.
Some thought is being given to removing the accessory case housing to examine all the gears, although we can probably get a good look by removing each accessory, and further use of the borescope.
OK, good that nothing happened in the air, like the pin jamming the crankshaft gear, but golly this is still bad news.
It is possible that those slight stumbles are related, perhaps the mag dogs jamming against the loosening pin, but who knows now.
* Orest
Took it off, and one of the Stop Pins on this dual mag is missing! #&^@*&^*&##
That is why the oil is leaking, there is a big hole. The stop pin fell into the engine, hopefully cleanly into the oil pan.
But, any way you slice this, this is going to cost money, maybe some, maybe a lot. Perhaps the least of it, but the mag cannot be field repaired, it will need a replacement case.
We already examined the mag sprocket, it looks undamaged. Borescoped into the mag opening, and nothing to see.
Pulled the oil filter, it looks clean, no metal. Will have a look at the screen tomorrow. Oil sample pulled for analysis.
If we are very lucky, the pin will fall out when we remove the drain plug, or maybe fiddle around with a magnet. Pushing a borescope up might visualize it. Otherwise it will mean pulling the oil pan.
Some thought is being given to removing the accessory case housing to examine all the gears, although we can probably get a good look by removing each accessory, and further use of the borescope.
OK, good that nothing happened in the air, like the pin jamming the crankshaft gear, but golly this is still bad news.
It is possible that those slight stumbles are related, perhaps the mag dogs jamming against the loosening pin, but who knows now.
* Orest
