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An air carrier flight crew thought that they had received an altitude assignment to descend to 10000 ft. When level at 10000 ft, the controller intervened, believing that the flight crew had only been cleared to descend to 11000 ft.
| Attributes | |
| ACN | 333820 |
| Time | |
| Date | 199602 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : olm airport : sea |
| State Reference | WA |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sea |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute airway : sea |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 20 flight time total : 5600 flight time type : 18 |
| ASRS Report | 333820 |
| 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 | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Fourth day of IOE for me and second leg of the day. I was well rested, and the flight was progressing well. We were assigned 10000 ft, PF read back 10000 ft, and 10000 ft was set in the flight mode annunciator. PF (me) confirmed 10000 ft and the aircraft leveled off at 10000 ft. Approach contacted us and said something about our being cleared to 11000 ft. He reclred us to 10000 ft. Nothing more was said to us by the controller about the confusion surrounding our initial clearance. Both of us on the flight deck still believe our original clearance was to 10000 ft not 11000 ft.
Original NASA ASRS Text
Title: AN ACR FLC THOUGHT THAT THEY HAD RECEIVED AN ALT ASSIGNMENT TO DSND TO 10000 FT. WHEN LEVEL AT 10000 FT, THE CTLR INTERVENED, BELIEVING THAT THE FLC HAD ONLY BEEN CLRED TO DSND TO 11000 FT.
Narrative: FOURTH DAY OF IOE FOR ME AND SECOND LEG OF THE DAY. I WAS WELL RESTED, AND THE FLT WAS PROGRESSING WELL. WE WERE ASSIGNED 10000 FT, PF READ BACK 10000 FT, AND 10000 FT WAS SET IN THE FLT MODE ANNUNCIATOR. PF (ME) CONFIRMED 10000 FT AND THE ACFT LEVELED OFF AT 10000 FT. APCH CONTACTED US AND SAID SOMETHING ABOUT OUR BEING CLRED TO 11000 FT. HE RECLRED US TO 10000 FT. NOTHING MORE WAS SAID TO US BY THE CTLR ABOUT THE CONFUSION SURROUNDING OUR INITIAL CLRNC. BOTH OF US ON THE FLT DECK STILL BELIEVE OUR ORIGINAL CLRNC WAS TO 10000 FT NOT 11000 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.