Aspen2013

Low oil pressure

Recommended Posts

On 2008 M20TN Acclaim Type S - Occasionally I have low oil pressure immediately after landing, in the yellow arc, and when I increase RPM to say 1700 it climbs but still in yellow arc. If I decrease to low idle of 830 then it drops into the red at 9 psi. Does not occur all the time. Any ideas? Only 20 hours on the oil. I never go over 25 on oil.

oil pressure.jpg

Edited by Aspen2013
  • Like 1

Share this post


Link to post
Share on other sites

*Members that donate $10 or more do not see advertisements*

I have always had more sensor failures than actual problems but check it out before flight.  Mechanical gauge.  Is it that low or faulty indication?

Share this post


Link to post
Share on other sites

It’s odd that even increasing the RPM to 1700 that the pressure indicates so low.  I would “tee” a mechanical test gauge into the line at the transducer.  Run it up on the ground and compare the two indications.

Oil type and viscosity will have a small effect on pressure.

Clarence

  • Like 2

Share this post


Link to post
Share on other sites

Your engine or your indicator is speaking to you - hopefully it's your indicator. Good job making sure you listen. So much better to sort it out and take care of it preventively on the ground rather than looking for a place to put it down with little or no power.

  • Like 2

Share this post


Link to post
Share on other sites

Red line is bad...

So... check the gauge... then adjust the pressure...

what oil are you using?

Best regards,

-a-

Share this post


Link to post
Share on other sites


Using Philips XC 20W-50 winter months and Aeroshell 100W all other months.  Like I said it happens very rarely. Was wondering if a certain flight profile like idle or low power on final with nose down etc.   Here are two pics of cruise and taxi oil pressure. This was the next day.

oil press cruise.jpg

oil press taxi (2).jpg

Edited by Aspen2013
  • Like 1

Share this post


Link to post
Share on other sites

That is looking more like a sensor challenge... Chasing wires may find what might be happening...

To have the OilP drop out the bottom, would require the OilT to go out the top of the range...

If the mechanical oil pressure regulator was failing... it probably wouldn’t fix itself the next day... 

Great pics, thanks for sharing them...

Ask your mechanic to check the oil pressure regulator to see if it has aged... check for loose wires for the OilP sensor...

PP thoughts only, not a mechanic...

Best regards,

-a-

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.