Aerodon

The 750 has a nice low rear end, especially without the remote audio panel. The remote panel does not have to be installed on top. And if you use a slim radio like the SL30, it can be installed a little lower. The GMC507 controller is also quite short behind the panel.

I have these never installed radios for sale. SL30 navcom with new install kit or prewired for MD200 indicator $3200. SL40 Com $1500.

I have a nice GTX345 with new install kit. Also GAE12 encoder for $250. Will accept some trades, GTX327 or 335 with GPS. Aerodon

Hi DC, The Mooney balance instructions are rather hard to read. They have a 'known weight' and variable distance method as well as 'absolute limits'. I prefer absolute limits as it is more consistent with other manufacturers procedures. I did a gross weight increase on a 252 to Encore. Similar procedure. The process called for a 'more balanced' rudder and a new part number for the lower balance weight. I installed the new lower balance weight and it balanced within limits without further ado. Your mod is similar, it also calls for a new balance weight, I assume it's the lower balance weight, not the rudder horn balance weight? If you have not installed it, I am not surprised that you are out of balance? To say it another way, if you have not changed the weight already, and your shop is trying to balance the rudder to the new specs, you should not be surprised that it is out of balance. I can't remember where the lower balance weight is, I will go look later. Aerodon

It has something to do with the way that the audio amp works in modern audio panels. And it's quite hard to do because now you have to open up the ceiling to get access to the speaker.

Yes, I am told not to wire up modern audio panels the way Cessna and Mooney used to do it. Do it like the PS Engineering shows it.

I think it is missing the ground plane, my plan is to use some adhesive backed copper foil and make sure there is a ground wire to the airframe somewhere? Aerodon

There was a Bonanza that crashed after a GFC500 A/P install - on a test flight with the technician - because of an incorrectly reinstalled trim system. There was another Beech where the avionics shop made swiss cheese out of the main spar web - leading to a lawsuit. @dc_brasil pictures and description above are troubling - no need to remove too much, but it looks like the elevator spring was not installed correctly. @unicom - the service manual is pretty good at describing the adjustment of the stops, adjustment of the trim indicator, and required horizontal stabilator. @pt20J has got the right solution - if you mark everything before you take it apart and put it back together again the same way you should have no issues. You have to 'split' the torque tube behind the avionics tray to get the new trim gear on the shaft. My local avionics guy subs the servo installation out to a properly qualified maintenance / structures shop. You need quite a high avionics installation to justify a decent in-house solution. Aerodon

So with a turbo there is a 7th probe just before the turbo (TIT), but normally aspirated, I have not seen one before.

This is a template for an adaptor plate I made on my CNC router for a Cygnet trim switch. The final was in 0.090 aluminum. It would be real easy to make the switchboard out of aluminum, I can't quite see - are all the inside faces vertical or tapered? And thickness? (I'm not a fan of 3D printing, always seems too fragile for the real world) Aerodon

So I am installing a GFC500 which has a trim servo behind the avionics tray. This thread got me thinking, the GMA28C spins the shaft for the elevator trim, and it 'reverse drives' the manual trim wheel. But now I see there is a trim servo near the manual trim that I still need to remove. This could probably be retrofitted to the manual trim and operated with an up down switch, but legality? Aerodon

The panel should have these plastic coated standoffs to prevent it dropping too low. I use aluminum spacers to replace the rubber lord mounts, but the OEM panel holes will not match the rivnuts in the airframe. They needed the rubber mounts to allow some degree of misalignment. Aerodon

BASparts have a 1 piece belly for M20K. I can take pictures of what the mountings look like. probably longer than you need? Approval??? Aerodon

I think Van's had 400 engine deposits of $10k. Then they received the balance before delivery. Then they paid Lycoming 30 days. But when they went bankrupt, the deposit holders lost.

There is a long line from th brake master cylinders to the reservoir behind the baggage compartment. Mine was leaking at the front T. Any brake leak will find its way to the drain on the removable belly panel.

I just bought some Rosens' so have a nice set of M20K visors.... Aerodon

I do this in my spare time for customers, my side hustle to fund my aviation habit. The later Mooneys are easier to do, I have several versions of OEM panels to start from. Most of the work is in the design and CAD, then it is relatively inexpensive to get a template cut by one of the commercial services. I always do the final on my AXYZ machine to make sure it is aviation grade aluminum and so I can test fit instruments before shipping. Sometimes I do additional work like countersinking, painting and even labelling. The first time for any panel is time consuming and iterative. It's hard to get it right the first time and it gets frustrating for me when I don't get good customer feedback o moving things around. I'll suck up a bit of the learning curve on 'new designs', I'll make it up later on repeat orders. I'm pretty good on M20J/K and later panels. I'm looking for a M20C-F project to expand my portfolio. You need to work with your local guy to get it installed and signed out. He will advise what parts you can help with. There is a lot of labour in taking things apart, and some detailed knowledge is required to remove old unwanted stuff. Aerodon

I can make pedal extensions according to your instructions and drawing 720115, as long as you know the process to get owner produced parts signed out by your guy. Aerodon

The wiring goes from the 50A CB to one side of the switch busbar, then that is jumpered over to the master switch side. If it is tripping with all switches in the off position, then this wire or the busbar itself is shorted to the frame. Or after tripping once, the CB is broken. Aerodon

Companies like Univair and McFarlane are much better setup to look after type certifies, PMA etc. and support owners.

Added some pictures. This is a Pro-G Hub, GNS430/530 cable and a PS7000 audio cable. Have many more.

I have a spare GAD43e for anyone who wants to do this.... Aerodon

Bump

$2200 for 4 cylinder system

I would put one of the 2.25" round comms in that spare space...