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An large transport crew, descending into las, misinterpreted ATC's instructions, overshooting published crossing restrs.
| Attributes | |
| ACN | 557036 |
| Time | |
| Date | 200208 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : las.airport |
| State Reference | NV |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival star : lynsy.lynsy1 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 150 |
| ASRS Report | 557036 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : published procedure non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued alert none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Airport ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On the lynsy RNAV one arrival to las vegas we were cleared via the arrival and to descend to 10000 ft. We both thought that ZLA wanted us down to 10000 ft now and fly the course of the arrival. We were level at 10000 ft prior to lynsy when ZLA handed us off to las approach. When checking on with las approach they questioned us why we were at 10000 ft and not 12000 ft. Usually we hear cleared to an altitude and comply with restrs, if the arrival is modified.
Original NASA ASRS Text
Title: AN LGT CREW, DSNDING INTO LAS, MISINTERPRETED ATC'S INSTRUCTIONS, OVERSHOOTING PUBLISHED XING RESTRS.
Narrative: ON THE LYNSY RNAV ONE ARR TO LAS VEGAS WE WERE CLRED VIA THE ARR AND TO DSND TO 10000 FT. WE BOTH THOUGHT THAT ZLA WANTED US DOWN TO 10000 FT NOW AND FLY THE COURSE OF THE ARR. WE WERE LEVEL AT 10000 FT PRIOR TO LYNSY WHEN ZLA HANDED US OFF TO LAS APCH. WHEN CHKING ON WITH LAS APCH THEY QUESTIONED US WHY WE WERE AT 10000 FT AND NOT 12000 FT. USUALLY WE HEAR CLRED TO AN ALT AND COMPLY WITH RESTRS, IF THE ARR IS MODIFIED.
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.