Altimeter rebuild recommendations

[Matthew P]

Well, while descending out of altitude today the altimeter started acting up, it wouldn't indicate a descent, then it would drop 500-800 feet, would indicate a normal descent then stick, then drop then work just fine...can anyone recommend a good repair shop....static ports are clear..

 

Tia

[C.J.]

2 hours ago, Matthew P said:

Well, while descending out of altitude today the altimeter started acting up, it wouldn't indicate a descent, then it would drop 500-800 feet, would indicate a normal descent then stick, then drop then work just fine...can anyone recommend a good repair shop....static ports are clear..

 

Tia

Rudy’s Aircraft Instruments. They overhauled my ASI. Very nice people, quick turnaround and reasonable $$.

[Bartman]

11 hours ago, Matthew P said:

Well, while descending out of altitude today the altimeter started acting up, it wouldn't indicate a descent, then it would drop 500-800 feet, would indicate a normal descent then stick, then drop then work just fine...can anyone recommend a good repair shop....static ports are clear..

 

Tia

I have notice my altimeter being jumpy and also affects the STEC 30 Alt hold, but not 800ft. It disappears when I open the alternate static and is a reminder to drain the water out of the system. 

[Mark942]

Muncie Aviation, Muncie, Indiana.  At my biannual Static Cert about 3 years ago, they found that my Altimeter failed the required accuracy. They removed the old one, and installed one they had rebuilt for $1K.  It has worked perfectly for 3 years.

-mark

[Aerodon]

On 11/17/2025 at 5:24 PM, Matthew P said:

Well, while descending out of altitude today the altimeter started acting up, it wouldn't indicate a descent, then it would drop 500-800 feet, would indicate a normal descent then stick, then drop then work just fine...can anyone recommend a good repair shop....static ports are clear..

 

Tia

There are so many airplanes getting glass cockpit upgrades that you can buy a nice United instruments altimeter with nice bright letters for less than you can get your old one repaired.  And you will save a few hundred dollars by getting the newer one installed at the same time as taking the old one out.

[skykrawler]

G5 installations require the retention of the standard altimeter.

Mine just failed the IFR cert (case leakage) and I chose to buy an overhauled United for $700 rather than have the Kollsman (probably original) overhauled.   The choice included not waiting for the round trip shipping plus overhaul time.

https://flyaqi.com/home.htm

 

[DRH4249]

On 11/17/2025 at 9:59 PM, C.J. said:

Rudy’s Aircraft Instruments. They overhauled my ASI. Very nice people, quick turnaround and reasonable $$.

I would second the motion for Rudy Aircraft Instruments.