Altimiter Error

[Jetjoc]

All of a sudden my altimeter is reading 4100 feet at a sea level airport about standard pressure. I have a vacume system anybody have any ideas on what happened?

[rrd1_99]

didn't hook your altimeter to your vacuum system.

How long has it been in service? Any thing happen that might have affected it? Like someone blowing in it or anything weird?

Roger
-9A slow QB

[Kyle Boatright]

Altimeters occasionally stick and have to be sent to a repair shop. Mine suffered that fate a couple of years ago. A shop in San Antonio repaired the altimeter and recalibrated it for ~$100 or so. You could probably find something on it in the RV-list archives.

[664781]

Left the plane one weekend with the Alt. good and came back the next week and it was reading 3200 ft. high. Re-calibrated and everything is now fine.

Go figure.