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A BE55 pilot is questioned by ZDV controller as to his reading on his altimeter. Center's reading showed aircraft mode C to be 100-200 ft too high.
| Attributes | |
| ACN | 425290 |
| Time | |
| Date | 199901 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : hut |
| State Reference | KS |
| Altitude | msl bound lower : 6000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Baron 55/Cochise |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Experience | flight time last 90 days : 150 flight time total : 11200 flight time type : 125 |
| ASRS Report | 425290 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
While in cruise, altitude was questioned by ATC. It was discovered that my encoding altimeter was indicating me off by 100-200 ft. ATC may have had erroneous readings. They suggested that that could be the case.
Original NASA ASRS Text
Title: A BE55 PLT IS QUESTIONED BY ZDV CTLR AS TO HIS READING ON HIS ALTIMETER. CTR'S READING SHOWED ACFT MODE C TO BE 100-200 FT TOO HIGH.
Narrative: WHILE IN CRUISE, ALT WAS QUESTIONED BY ATC. IT WAS DISCOVERED THAT MY ENCODING ALTIMETER WAS INDICATING ME OFF BY 100-200 FT. ATC MAY HAVE HAD ERRONEOUS READINGS. THEY SUGGESTED THAT THAT COULD BE THE CASE.
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.