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A B737-300 flight crew began descent from assigned altitude and was reminded of correct altitude by las TRACON.
| Attributes | |
| ACN | 436680 |
| Time | |
| Date | 199905 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : las.airport |
| State Reference | NV |
| Altitude | msl bound lower : 7800 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 25l |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : multi engine pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 18500 flight time type : 10000 |
| ASRS Report | 436680 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory flight crew : returned to assigned airspace |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Possible misunderstanding/readback of altitude cleared to on descent into las during arrival. We set 7000 ft into altitude warning window and confirmed this between crew members. Leaving 7800 ft, approach control queried us and reminded us to level at 8000 ft, our assigned altitude. I believe we were given an altitude change and airspeed change to 170 KTS. We may have heard '7000 ft' and not 8000 ft as the assigned altitude.
Original NASA ASRS Text
Title: A B737-300 FLC BEGAN DSCNT FROM ASSIGNED ALT AND WAS REMINDED OF CORRECT ALT BY LAS TRACON.
Narrative: POSSIBLE MISUNDERSTANDING/READBACK OF ALT CLRED TO ON DSCNT INTO LAS DURING ARR. WE SET 7000 FT INTO ALT WARNING WINDOW AND CONFIRMED THIS BTWN CREW MEMBERS. LEAVING 7800 FT, APCH CTL QUERIED US AND REMINDED US TO LEVEL AT 8000 FT, OUR ASSIGNED ALT. I BELIEVE WE WERE GIVEN AN ALT CHANGE AND AIRSPD CHANGE TO 170 KTS. WE MAY HAVE HEARD '7000 FT' AND NOT 8000 FT AS THE ASSIGNED ALT.
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.