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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Approach controller advised cpr jet his transponder showed 500 ft high. Captain checked with other controllers and agreed his transponder was 2-300 ft high.
| Attributes | |
| ACN | 195863 |
| Time | |
| Date | 199112 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mco |
| State Reference | FL |
| Altitude | msl bound lower : 11000 msl bound upper : 11500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mco |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 9854 flight time type : 700 |
| ASRS Report | 195863 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
We were level at 11000 ft when approach control said mode C reads 11500 descend right now to 11000 ft. I told the controller we were at 11000. She replied my mode C still read 11500 descend to 11000 right now. So I descended to 10500. I checked with controllers the rest of the trip to tallahassee, fl, and mode C was off 200-300 ft.
Original NASA ASRS Text
Title: APCH CTLR ADVISED CPR JET HIS TRANSPONDER SHOWED 500 FT HIGH. CAPT CHKED WITH OTHER CTLRS AND AGREED HIS TRANSPONDER WAS 2-300 FT HIGH.
Narrative: WE WERE LEVEL AT 11000 FT WHEN APCH CTL SAID MODE C READS 11500 DSND RIGHT NOW TO 11000 FT. I TOLD THE CTLR WE WERE AT 11000. SHE REPLIED MY MODE C STILL READ 11500 DSND TO 11000 RIGHT NOW. SO I DSNDED TO 10500. I CHKED WITH CTLRS THE REST OF THE TRIP TO TALLAHASSEE, FL, AND MODE C WAS OFF 200-300 FT.
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.