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Altitude overshot by first officer of a B767ER during an arrival descent due misunderstanding of clearance and the controller not hearing readback error by first officer.
| Attributes | |
| ACN | 497300 |
| Time | |
| Date | 200101 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : eno.vortac |
| State Reference | DE |
| Altitude | msl bound lower : 18000 msl bound upper : 19000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B767-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : robinsville one |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 180 flight time total : 18000 flight time type : 500 |
| ASRS Report | 497300 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : altimeter other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
First officer was flying and talking to ZDC, and I was off frequency obtaining gate information from company. He had accepted, read back, and descended to FL180. When I came back on frequency, center asked us to verify level at FL190. I told them we were level at FL180, and asked if we should climb. Controller said no, and cleared us lower. First officer said that he was sure that he heard and read back FL180 in the original clearance when I was off frequency. Nothing else was said about it from ATC.
Original NASA ASRS Text
Title: ALT OVERSHOT BY FO OF A B767ER DURING AN ARR DSCNT DUE MISUNDERSTANDING OF CLRNC AND THE CTLR NOT HEARING READBACK ERROR BY FO.
Narrative: FO WAS FLYING AND TALKING TO ZDC, AND I WAS OFF FREQ OBTAINING GATE INFO FROM COMPANY. HE HAD ACCEPTED, READ BACK, AND DSNDED TO FL180. WHEN I CAME BACK ON FREQ, CTR ASKED US TO VERIFY LEVEL AT FL190. I TOLD THEM WE WERE LEVEL AT FL180, AND ASKED IF WE SHOULD CLB. CTLR SAID NO, AND CLRED US LOWER. FO SAID THAT HE WAS SURE THAT HE HEARD AND READ BACK FL180 IN THE ORIGINAL CLRNC WHEN I WAS OFF FREQ. NOTHING ELSE WAS SAID ABOUT IT FROM ATC.
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.