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Very erratic oil pressure


Scrapman1959

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Posted

2011 CTLS with 1040 hrs TT. Oil pressure gyrations has been getting steadily worse with today's flight seeing 23 to 55 lbs In wcruise. The needle moves rapidly. Connection on the sender is clean and tight. We did the extra grounding years ago. Engine oil is full as always, and engine sounds normal. Any ideas guys? I was going to replace the oil sending unit for starters.

Posted

Take out the oil pressure regulator ball or cone and look it over. They use to all have balls and

later went to springs in order to stabilizer the oil pressure. Having the cone is one of the

conditions for the 2000 hour TBO. Over time, the cone can get scored, which might affect the oil pressure. WF

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