Narrative:

Arriving den we were turning and leveling in turbulence, when approach called we were 500' low, the first officer's altimeter was indicating improperly. Maintenance action was taken. Supplemental information from acn 141189. When arriving in denver area, approach told us we were 500' low. We were in a turn and leveling in turbulence. The first officer's altimeter was sticking high and not indicating properly. We were in the process of correcting at the time we were notified by ATC. Maintenance action was taken.

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Original NASA ASRS Text

Title: ALTIMETER DISAGREEMENT OF 500' LEADS TO ALT DEVIATION.

Narrative: ARRIVING DEN WE WERE TURNING AND LEVELING IN TURB, WHEN APCH CALLED WE WERE 500' LOW, THE F/O'S ALTIMETER WAS INDICATING IMPROPERLY. MAINT ACTION WAS TAKEN. SUPPLEMENTAL INFO FROM ACN 141189. WHEN ARRIVING IN DENVER AREA, APCH TOLD US WE WERE 500' LOW. WE WERE IN A TURN AND LEVELING IN TURB. THE F/O'S ALTIMETER WAS STICKING HIGH AND NOT INDICATING PROPERLY. WE WERE IN THE PROCESS OF CORRECTING AT THE TIME WE WERE NOTIFIED BY ATC. MAINT ACTION WAS TAKEN.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.