Oil leak back firewall. Leaks down to nos gear doors

[Jpaultaboda]

Hello all I have a leak I noticed that started after a 3 hour flight. Nose gear doors full of oil and a puddle in aft firewall. Possibly from prop governor. I want to do a engine run on the ground but don’t know what settings I should use to properly test the prop to see if it’s coming from there. Thanks In advance all.

 

 

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[neilpilot]

Not saying you have this problem, but a few flight hours after an annual by a well respected MSC I had the same observation.  In may case, a mag had come loose and was literally hanging on.  

[Jpaultaboda]

Just now, neilpilot said:

Not saying you have this problem, but a few flight hours after an annual by a well respected MSC I had the same observation.  In may case, a mag had come loose and was literally hanging on.  

The engine just came out of IRAN

[Jpaultaboda]

[StevenL757]

15 minutes ago, Jpaultaboda said:

The engine just came out of IRAN

How about starting with...

• Airplane you own
• Where you're located
• What maintenance was done recently
• A little history on the airplane itself and how you were operating the AC during the last flight or two leading up to this...in other words, observations you made (besides the obvious oil leaks)

This helps establish a better problem statement and will allow others to help you troubleshoot.  To @neilpilot's point, shockingly-enough, more MSCs than I care to count have screwed up folks' airplanes in some way - both here and outside this forum.

There are many exceptional maintenance-savvy folks on here.  "Help them to help you".  :-)

Steve

[Jpaultaboda]

It’s a 1977 m20J that I just purchased. I flew the plane 3 hours normal climb and descent to 8500 feet. Annual and Iran was done a month  ago when I purchased it. Iran was done due to a pitted camshaft found during a R&R of a bad cylinder. 

[Andy95W]

39 minutes ago, Jpaultaboda said:

The engine just came out of IRAN

That means it could be anything and/or everything.

[PT20J]

Here’s where I would start. 1. Remove the upper and lower cowling. 2. Check the security of all accessories and hoses.  3. Wash the engine with solvent to remove all the oil and let dry. 4. Do a normal run up. 5. Check for leaks. 

[mike_elliott]

Might I suggest

1) go to smile.amazon.com and select Mooney Summit, Inc. as your charity.

2) order https://smile.amazon.com/Aircraft-Tool-Supply-Magnaflux-Spotcheck/dp/B005VR2RDK/ref=sr_1_1?crid=YT8T4EKK5Q3T&dchild=1&keywords=magnaflux+developer&qid=1587478081&sprefix=magnaflux%2Caps%2C185&sr=8-1

3) COMPLETELY CLEAN the engine and suspected areas of leak with mineral spirits and a sprayer.

4) Spray any suspected areas with the Magnaflux developer

5) Ground run hard for 10 Minutes

6) The source of the leak will be obvious

 

[Jpaultaboda]

Update. It’s coming from the pressure relief valve.


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[Guest]

9 minutes ago, Jpaultaboda said:

Update. It’s coming from the pressure relief valve.


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Engine oil pressure relief valve or propeller governor pressure relief valve?

Clarence

[Guest]

3 hours ago, Jpaultaboda said:

The Adel clamp under the oil filter in the picture appears to be loose.

Clarence

[Mooney217RN]

Hard to tell from your picture.  First off, from the gear door picture, you have a problem.  Don't fly it.

My recollection is that your governor is back there, I can see in the photo of the prop control leading to the governor.  The governor is as I recall below the oil filter and slightly offset to the right.  Look good there first.

[Jpaultaboda]

Governor pressure relief valve was leaking. Removed and sending out to Iran


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[carusoam]

Welcome aboard JPaul.

Go MS!
 

-a-

[copierdynamics]

Mag or prop governor, had em both.

 

[Pete M]

No warrenty service from the iran or install shops? I'd start there.

[Guest]

1 hour ago, Pete M said:

No warrenty service from the iran or install shops? I'd start there.

If the engine installer didn’t repair the propeller governor and the shop who repaired the engine didn’t fix the propeller governor, the problem belongs to the owner.

Clarence

[Pete M]

Did they remove and re-install the prop gov? Did they test run before return to service?  If its me and my plane come back with an oil leak like that it goes back. Not sayin it aint owners responsibility but i want a&p eyes on it. I'd also want a good explanation for why something they removed and re-installed is now broken. Might be reasonable, who knows...

[Guest]

39 minutes ago, Pete M said:

Did they remove and re-install the prop gov? Did they test run before return to service?  If its me and my plane come back with an oil leak like that it goes back. Not sayin it aint owners responsibility but i want a&p eyes on it. I'd also want a good explanation for why something they removed and re-installed is now broken. Might be reasonable, who knows...

The OP says the oil is leaking from the propeller governor relief valve, I don’t know how the installer could cause it to leak?  A ground run up might not necessarily show a leak during the run up.

Sometimes things go wrong that are beyond anyone’s control.

Clarence

[Jpaultaboda]

Governor installed after Overhaul. No leaks after 80 hours of flying. I’m a happy flyer now ! 

[carusoam]

@corn_flake   Something that may be of interest to you....

Great follow-up Jpaul.

Best regards,

-a-