Used for a 1990 M20J. Just have to trim 3/8” off the front and enlarge the hole for the wiring harness Fits perfect.

Paul B Verified Purchase

Airpath Spare Compass Housing 727A

The housing fit my C-2450-L4V compass perfectly radially. The housing is specified for a C-2400-L4V which is ~ 3/8 longer than the C-2400-L4V which required a slightly longer rear mounting screw for the C-2450-L4V.

Aaron Q Verified Purchase

Airpath Spare Compass Housing 727A

The compass fist securely -- perfectly -- in the housing with no magnetic deviation. Based on previous reviews, I placed a thin rubber pad between the base of the unit and the windshield post to damp vibration. I have no idea if this is necessary or will even make a difference -- especially as I do not have vibration issues with my plane -- but it was a simple enough precaution. So far I am very pleased with it.

As others have repeatedly said, the plastic used is rather flimsy and breaks under vibration especially in Mooney aircraft. It needs to be strengthened. However, the price is reasonable and the service from AS&S was quick....so 3 for the product and 5 for the supplier

Needed to drill a larger hole in the housing in order to get my wires for the light to go through. Also needed to trim off some of the front of the housing, so that the compass would fit in properly. Good thing, is that it kept me from buying an entire compass.

Flimsy material broke again!

As the others have said, the base is very flimsy and breaks easily. I too own a Mooney and it broke again this weekend. I have two of these units on constant rotation. If you do buy this product keep the old one and repair it if you can with crazy glue so you can swap out the new one when it breaks and then repair the broken one for the next swap. I have used electrical tape to try and damper the vibration, but will not try a patch from a bicycle inner tube and hope this works better. I have a slaved compass so my whiskey compass is really a decoration, but it annoys me to see it hanging from its wires too often.

Same issue as others with breaking at base. It fell off as we were pulling to fuel pumps. Wires were only thing holding it from falling in the floor. Very poor materials in construction .

As a previous reviewer stated, on a Mooney center post, this will not last long. It is plastic and the vibration will crack it in short order. It is the only choice if I want to keep my relatively new Airpath compass - will probably go vertical card compass when this one breaks again, which it will.

I had a similar experience as Charles R. I have a Mooney 201 and the first mount cracked from vibration. I had the prop balanced and the compass still shakes but the mount hadn’t broken. One night I’m taking the glareshield off my plane and barely hit the compass and the mount cracks rendering it broken and unusable. Now my plane is grounded until I put a new mount on. I wish they used better quality plastic to make these. They look flimsy and fragile.

The very light weight plastic is unable to withstand the normal vibration of the center post of my Mooney. I have had to replace this housing three times after one of the mounting flanges breaks off, the last one lasting only about ten hours. This housing should be made out of aluminum. Unfortunately this appears to be the only housing available for an airpath compass.