Play in the jack screw. Replace?

[cogboxer]

So my jackscrew for elevator trim seems to have some play in it. The screw itself moves a little in the housing, and there looks to be some play in the mounting bracket with the two bolts holding it to the tail assembly (maybe elongated holes or worn bushings there). 

This look like a replacement situation to you? 

video of play in the screw

[N201MKTurbo]

I would tighten the bolts that hold the screw in so it doesn't move, and then see how it is. It shouldn't move up and down. If the screw is moving in its bearings, I would check the bearing shims.

[0TreeLemur]

On 7/1/2022 at 2:39 PM, N201MKTurbo said:

I would tighten the bolts that hold the screw in so it doesn't move, and then see how it is. It shouldn't move up and down. If the screw is moving in its bearings, I would check the bearing shims.

Something is loose.   That shouldn't happen.

[KSMooniac]

I would remove it for an inspection at the very least.

Sent from my LM-V405 using Tapatalk

[Ragsf15e]

On 7/1/2022 at 12:04 PM, cogboxer said:

So my jackscrew for elevator trim seems to have some play in it. The screw itself moves a little in the housing, and there looks to be some play in the mounting bracket with the two bolts holding it to the tail assembly (maybe elongated holes or worn bushings there). 

This look like a replacement situation to you? 

video of play in the screw

How were you making it do that?  By physically pushing the rod up/down?  Trimming the wheel?

 I will look more closely at mine next annual, but that would concern me.

[jetdriven]

Lifting the tail I’d imagine. Send it to LASAR for new bearings and to have it shimmed tightly. And also replace those bolts that hold it to the fuselage. 

[Guest]

There is a thread on here showing disassembly repair and re assembly.  It’s pretty straightforward.

 Clarence 

[cogboxer]

On 7/2/2022 at 9:33 PM, Ragsf15e said:

How were you making it do that?  By physically pushing the rod up/down?  Trimming the wheel?

 I will look more closely at mine next annual, but that would concern me.

By lifting the tail slightly under the rudder. 

[Guest]

Search “Trim jackscrew binding “ Mooneyspace and you’ll find the thread.

Clarence

[skykrawler]

A few inches forward of that space between the tail assembly and the fuselage in your video, on each side are holes in the skin that provide access to the bolts and nuts that hold the jackscrew assembly in place.  The bolts are oriented horizontally.  Check those for tightness.  If they are tight you must have a bearing problem.   This is a maintenance discrepancy and you should be reluctant the fly the airplane with the stabilizer trim like that, especially with family or other passengers.

[cliffy]

There are limits to the movement in the maintenance manual for the rudder in and out by liftin Its a pretty small amount

Double check if you have any movement at the tip of the horizontal stabilizer up/down   fore/aft  Can have worn bushings and/or or close tolerance bolts. 

DO NOT replace the stabilizer hinge bolts with anything other than "close tolerance"  bolts if you have play there. 

Where the cross bolts go through the jackscrew there are replaceable  bushings

It does look like you have too much play in the screw itself. 

Really needs to be fixed now.