Mooney M20F w/ inop Rajay turbo normalizer

[tomgo2]

Hi Everyone,

Thank you for tagging me @carusoam.

RAJAY was consulted by the MSC. We walked through all the potential issues. RAJAY never physically inspected the plane, but we walked through all the systems. Based on our conversations, it seems like they covered all the bases.. As others have mentioned, it is a simple system. Sometimes it just takes a different pair of eyes to find the problem. There is a RAJAY Authorized Service Center at our home field near San Antonio and would be happy to put an eyeball on it. The airport is 1T7.

 

[gsxrpilot]

If you take the plane to 1T7, be careful, you might wind up with a whole different Mooney. That's happened to more than a few people on this forum. 

[Greg_D]

11 hours ago, gsxrpilot said:

If you take the plane to 1T7, be careful, you might wind up with a whole different Mooney. That's happened to more than a few people on this forum. 

Maybe he can swap it with the TN F model Jimmy has over there :).  But he'd have to start all over with the panel again.

[carusoam]

http://www.fltplan.com/AirportInformation/1T7.htm
 

That makes a great visit... 

Keeping good financial control is everything when in that neighborhood...

Best regards,

-a-

[Guest]

Although the turbo has been removed, checked and reinstalled, is it possible that the installing mechanic accidentally dropped something into the compressor inlet?  I’ve seen this on the same system on a Twin Comanche.  A small 8-32 screw was jamming the compressor stopping it from turning.

Clarence

[wcb]

1 hour ago, M20Doc said:

Although the turbo has been removed, checked and reinstalled, is it possible that the installing mechanic accidentally dropped something into the compressor inlet?  I’ve seen this on the same system on a Twin Comanche.  A small 8-32 screw was jamming the compressor stopping it from turning.

Clarence

That or just simply dropped it.  Turbo's have extremely tight tolerances

[chriscalandro]

On 11/1/2020 at 6:11 PM, carusoam said:

Our RayJay guy is @tomgo2...

How many weeks is the PPI going on now?

At what point do you just let it go, and look for a plane that is working properly?

Tough spot to be in...

Best regards,

-a-

Even if this was the case, and someone took my perfectly working airplane for a prebuy, and returned it not working, we’d have a problem. 
 

you don’t do that. 

[takair]

When all else fails, include some of pictures of the installation.  

[M20F-1968]

The airbox and flapper valve is a weak link in the original RaJay system.  The flapper may seem closed, but a small leak can bleed off the pressure differential to the point that the turbo never starts fully spinning.  

John Breda

[aaronschardt]

I'll chime in here, I owned 642DG for about 10 years. 2009-2019.  I think I bought it from Greg_D.  I'm sure you've checked this, but the RayJay on that airplane didn't engage until that knob (which was very hard to push when i owned it) is nearly all the way in.  The pressure is not linear to the knob position.   Other things to consider is the flap valve.  The hinge broke on me once inside the air control and the valves were almost free in the system.  Don Maxwell caught that one and fixed it, but you may check that again, it's a weak spot.  I had the vband clamp break on me once due to the vibration between the engine and the turbo that let pressure out.  Don't get discouraged, you'll figure it out eventually and its a really great machine.  I loved it and only sold when the family got too big.  Contact me if you have any other questions on its history, happy to help if I can.  -Aaron 

[RobertGary1]

Yea, I'm startled this isn't simple. When they pulled the turbo out could they spin it by hand? Is it bound up? Can you get boost on the ground with someone watching the valve from the side? This doesn't seem like rock science.

 

-Robert

[tomgo2]

In following up with the MSC, they have it figured out and good to go. Love a report on the final conclusion from the OP if possible. Congrats on the purchase. RAJAY is here to support in the future.

Edited November 6, 2020 by tomgo2

[carusoam]

Welcome aboard, Aaron. Great details on your experience... fantastic first post!

 

@tomgo2, can you share more about you know? Like what the issue was...

 

@RCBass Sounds like the good news is coming together...  see the request from to go above...

 

MS has a lot of skills... all in one place!

Go MS!

Best regards,

-a-

[MIm20c]

1 hour ago, tomgo2 said:

In following up with the MSC, they have it figured out and good to go. Love a report on the final conclusion from the OP if possible. Congrats on the purchase. RAJAY is here to support in the future.

Please fill us in.  Info like this will help many others avoid having the plane AOG for a couple months. 

[RCBass]

On 11/5/2020 at 7:36 PM, tomgo2 said:

In following up with the MSC, they have it figured out and good to go. Love a report on the final conclusion from the OP if possible. Congrats on the purchase. RAJAY is here to support in the future.

It turned out to be something very simple but obscure... The intake hose has a liner in it that was evidently coming loose and blocking the intake. They noticed it constricting when the Rajay was engaged. Works great now. 

[RCBass]

All, sorry for the slow response, I'm still kind of new at this. It was resolved... It turned out to be something very simple but obscure... The intake hose has a liner in it that was evidently coming loose and blocking the intake. They noticed it constricting when the Rajay was engaged. Works great now. 

Thank you for all the responses! I did run several of them by the shop before they discovered what it was. Also, a shout out to Maxwell MSC in Longview for staying with it until they got it figured out. Very grateful to those guys...

Safe flying everyone,

Russ

[tomgo2]

6 minutes ago, RCBass said:

All, sorry for the slow response, I'm still kind of new at this. It was resolved... It turned out to be something very simple but obscure... The intake hose has a liner in it that was evidently coming loose and blocking the intake. They noticed it constricting when the Rajay was engaged. Works great now. 

Thank you for all the responses! I did run several of them by the shop before they discovered what it was. Also, a shout out to Maxwell MSC in Longview for staying with it until they got it figured out. Very grateful to those guys...

Safe flying everyone,

Russ

Thanks for sharing Russ.

PSA - I will also take this time to remind everyone that SCAT and SCEET hose IS NOT the appropriate hose type to use on the RAJAY installations. RAJAY has specifically designed and certified flexible duct hoses which are much more robust with a higher heat resistance.  This would not have happened if the correct hose type was used.

Tom

[gsxrpilot]

4 minutes ago, tomgo2 said:

Thanks for sharing Russ.

PSA - I will also take this time to remind everyone that SCAT and SCEET hose IS NOT the appropriate hose type to use on the RAJAY installations. RAJAY has specifically designed and certified flexible duct hoses which are much more robust with a higher heat resistance.  This would not have happened if the correct hose type was used.

Tom

I'm pretty sure that wasn't the problem.

 

[carusoam]

Great follow-up Russ!

Nothing like multi-layer tubes and hoses falling apart from the inside...

Some fuel lines experience a similar type of failure sending bits and pieces towards the fuel injectors...

Great pirep for DMax and company! 

Best regards,

-a-