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Reported situation of aircraft altitude being displayed 500 ft higher than assigned. Radar coverage reported as spotty and sometimes inaccurate by center controller.
| Attributes | |
| ACN | 363909 |
| Time | |
| Date | 199703 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : obn |
| State Reference | FO |
| Altitude | msl bound lower : 35000 msl bound upper : 35500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma tower : lga |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 800 |
| ASRS Report | 363909 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
ZMA reported our altitude as FL355 when it was steady state cruise at FL350, smooth air. The controller reported our flight level due to crossing traffic. Subsequent controller indicated that radar coverage was 'spotty' in the area and sometimes not reliable, also initial controller said sometimes when they have converging traffic radar did not always give accurate information.
Original NASA ASRS Text
Title: RPTED SIT OF ACFT ALT BEING DISPLAYED 500 FT HIGHER THAN ASSIGNED. RADAR COVERAGE RPTED AS SPOTTY AND SOMETIMES INACCURATE BY CTR CTLR.
Narrative: ZMA RPTED OUR ALT AS FL355 WHEN IT WAS STEADY STATE CRUISE AT FL350, SMOOTH AIR. THE CTLR RPTED OUR FLT LEVEL DUE TO XING TFC. SUBSEQUENT CTLR INDICATED THAT RADAR COVERAGE WAS 'SPOTTY' IN THE AREA AND SOMETIMES NOT RELIABLE, ALSO INITIAL CTLR SAID SOMETIMES WHEN THEY HAVE CONVERGING TFC RADAR DID NOT ALWAYS GIVE ACCURATE INFO.
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.