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GA small aircraft reads back wrong altitude and overshoots assigned altitude on descent. Operational deviation.
| Attributes | |
| ACN | 104897 |
| Time | |
| Date | 198902 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ont |
| State Reference | CA |
| Altitude | msl bound lower : 7600 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ont |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 60 flight time total : 2600 flight time type : 300 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation |
Narrative:
I was on top of a cloud layer approximately 30 mi southeast of paradise VOR and descending out of 10500' en route to fullerton airport. I requested an approach to fullerton with ont approach and was given a clearance to homeland VOR, and then via victor 283 and cleared to 7000'. I acknowledged the clearance by reading it back in its entirety. Several mins later the controller stated that he showed me descending through 7600' and that I was only cleared to 8000'. I responded that I understood that my clearance was to 7000'. The controller replied, 'no, you were cleared to 8000'. Climb to 8000' and remain there.' I still believe that my original clearance was to 7000' and that when I read it back the controller did no recognize the error, neither his nor mine, if he wanted me to descend to 8000'.
Original NASA ASRS Text
Title: GA SMA READS BACK WRONG ALT AND OVERSHOOTS ASSIGNED ALT ON DESCENT. OPERATIONAL DEVIATION.
Narrative: I WAS ON TOP OF A CLOUD LAYER APPROX 30 MI SE OF PARADISE VOR AND DSNDING OUT OF 10500' ENRTE TO FULLERTON ARPT. I REQUESTED AN APCH TO FULLERTON WITH ONT APCH AND WAS GIVEN A CLRNC TO HOMELAND VOR, AND THEN VIA VICTOR 283 AND CLRED TO 7000'. I ACKNOWLEDGED THE CLRNC BY READING IT BACK IN ITS ENTIRETY. SEVERAL MINS LATER THE CTLR STATED THAT HE SHOWED ME DSNDING THROUGH 7600' AND THAT I WAS ONLY CLRED TO 8000'. I RESPONDED THAT I UNDERSTOOD THAT MY CLRNC WAS TO 7000'. THE CTLR REPLIED, 'NO, YOU WERE CLRED TO 8000'. CLB TO 8000' AND REMAIN THERE.' I STILL BELIEVE THAT MY ORIGINAL CLRNC WAS TO 7000' AND THAT WHEN I READ IT BACK THE CTLR DID NO RECOGNIZE THE ERROR, NEITHER HIS NOR MINE, IF HE WANTED ME TO DSND TO 8000'.
Data retrieved from NASA's ASRS site as of August 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.