GFC 500 installation – pitch trim change & aggressive IAS climb

[Bartman]

This is exactly why I own maintenance manual, illustrated parts catalog, research and interact on mooneyspace, and participate in my own maintenance. I’m a physician but have a mechanical background, and the thought processes for differential diagnosis and treatment of illness are the same as mechanical issues. I am blessed to have a great IA that I work with and he appreciates all off the research and information I bring to the table before anybody touches my airplane, including him. For example, about 15 years ago we removed the trim jack screw and sent to LASAR for service. All of the information was in the MM and had been discussed here on Mooneyspace, and we avoided this exact issue during installation and return to service. I am very thankful for this community !

As a couple of members stated above, this should be entered as a service difficulty report. 

[DC_Brasil]

Very interesting (negatively, of course) to see many similar accounts. Indeed, there seems to be a repeating pattern here.

 

15 hours ago, Bartman said:

This is exactly why I own maintenance manual, illustrated parts catalog, research and interact on mooneyspace, and participate in my own maintenance. 

Unfortunately,  Garmin doesn't publicly offer installation manuals or STC supplements unless you're an authorized dealer. So we actually have no way of knowing in advance what and how things will be done to get minimally involved. 

[PT20J]

30 minutes ago, DC_Brasil said:

Very interesting (negatively, of course) to see many similar accounts. Indeed, there seems to be a repeating pattern here.

 

Unfortunately,  Garmin doesn't publicly offer installation manuals or STC supplements unless you're an authorized dealer. So we actually have no way of knowing in advance what and how things will be done to get minimally involved. 

In this case, it would not help. The installation information does not describe the need to maintain trim position integrity after the installation. 

[blaine beaven]

I feel lucky because I didn’t have these issues post GFC500 install, but great point about knowing where to expect your elevator in relation to trim indication, and looking hard at that post maintenance 

[Bartman]

12 hours ago, PT20J said:

In this case, it would not help. The installation information does not describe the need to maintain trim position integrity after the installation. 

If I have work done that involved the elevator trim or another critical system I would absolutely research.  The Mooney trim system is unique and I would absolutely provide crucial information including maintenance procedures to the shop performing the work. I use “teach back” all the time and I would make sure the shop can verbalize the importance, and would specifically ask about the install and rigging on pickup.  I would also be aware of potential incorrect rigging of the trim system and know how to test it during preflight to ensure travel to the stops in both directions and confirm the indicator is working properly too. 

I’m not trying to make myself look better than anyone else. My brain just thinks risk mitigation and I’m simply putting the things I have learned from experience and on Mooneyspace into practice.