ASPEN stoped talking to my STEC55X

[Oscar Avalle]

My Aspen PFD stopped talking to my STEC55x. I change the heading on the ASPEN nothing happens, I dial in the altitude and the plane does not climb... I push try to use GPSS and I get a failed message from the STEC55x display. Any ideas what may be going on?

Thanks...

Oscar

[Cruiser]

does the STEC 55x pass the self test ? 

[Mooney in Oz]

3 hours ago, Oscar Avalle said:

My Aspen PFD stopped talking to my STEC55x.

Sounds like a married couple 

Which navigator do you have?

When the failed GPSS appears, which one are you using? The Aspen or STEC?

[PT20J]

I had this problem with my Aspen and KAP 150. Turned out to be a bad ACU. I believe that the 55X requires an ACU2. When I talked to Aspen tech support, I got the idea that ACU failures were not that uncommon. If that is the problem, Aspen will trade yours for a refurbished one - I don't know the current price. I found a used one on eBay.

Skip

[rbridges]

3 minutes ago, PT20J said:

I had this problem with my Aspen and KAP 150. Turned out to be a bad ACU. I believe that the 55X requires an ACU2. When I talked to Aspen tech support, I got the idea that ACU failures were not that uncommon. If that is the problem, Aspen will trade yours for a refurbished one - I don't know the current price. I found a used one on eBay.

Skip

The ACU was going to be my guess, but I'm far from knowledgeable about the subject.

[PT20J]

There's an autopilot trouble shooting guy that hangs about that could help you narrow it down. I blank on his name at the moment but Anthony @carusoam should be along any moment to help us out .

[carusoam]

Well...

When talking AP parts we have @Jake@BevanAviation

Jake has been able to help some MSers with identify what was not working first... before sending the parts in to be refurbed or OH’d...

But for real AP trouble shooting we have...

@Bob Weber

Then autopilots central...

Best regards,

-a-

[Jake@BevanAviation]

I would have to start at the ACU first and look at the signals going to the S-Tec.  A ACU failure would result in the A/P system just maintaining wings level and maybe alt hold if it will pass its PFT.

[Oscar Avalle]

2 hours ago, Jake@BevanAviation said:

I would have to start at the ACU first and look at the signals going to the S-Tec.  A ACU failure would result in the A/P system just maintaining wings level and maybe alt hold if it will pass its PFT.

Thank you! To all of you. They are working as we speak. It seems the ACU is a good guess. I will report back... very frustrating...

[Oscar Avalle]

16 hours ago, Mooney in Oz said:

Sounds like a married couple 

Which navigator do you have?

When the failed GPSS appears, which one are you using? The Aspen or STEC?

You got it!!!! It is like a married couple... I have a GTN750 and I was using the ASPEN.

[Oscar Avalle]

16 hours ago, Cruiser said:

does the STEC 55x pass the self test ? 

Yes

[Oscar Avalle]

Well, thank you for your inputs. Extremely helpful! After a long troubleshooting process, the problem seems to be the cable that goes to the servo. I painted the plane recently and it must have been damaged somehow. But once you connect the servo directly it works.




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[LANCECASPER]

4 hours ago, Oscar Avalle said:

You got it!!!! It is like a married couple... I have a GTN750 and I was using the ASPEN.

A married couple, each from different cultures.

[Mooney in Oz]

11 hours ago, Oscar Avalle said:

After a long troubleshooting process, the problem seems to be the cable that goes to the servo.

Good to see you got it sorted in quick time, Oscar.

The reason I asked which navigator and GPSS you use is because I have 2 x IFDs, an Aspen and a 55x combo. If the 55x is initialised before the IFDs, the GPSS in the 55x fails to engage.

Anyone else who has a similar combo with that issue, just initialise your IFD first and all will be good.  The IFD likes to be on top of the pecking order.

[Oscar Avalle]

19 hours ago, LANCECASPER said:

A married couple, each from different cultures.

Very difficult to make it work.

[Oscar Avalle]

10 hours ago, Mooney in Oz said:

Good to see you got it sorted in quick time, Oscar.

The reason I asked which navigator and GPSS you use is because I have 2 x IFDs, an Aspen and a 55x combo. If the 55x is initialised before the IFDs, the GPSS in the 55x fails to engage.

Anyone else who has a similar combo with that issue, just initialise your IFD first and all will be good.  The IFD likes to be on top of the pecking order.

Yes, I have not flown yet... but I hope it works... otherwise I will be back...