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A B737-300 captain reported that ZLA requested a leveloff at an altitude that the flight had already passed during approach to las.
| Attributes | |
| ACN | 629911 |
| Time | |
| Date | 200409 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | intersection : clarr |
| State Reference | CA |
| Altitude | msl single value : 25000 |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : kepec |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 170 flight time total : 27000 flight time type : 14000 |
| ASRS Report | 629911 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : overshoot |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
During descent into las on the kepec 1 arrival, we were initially cleared to FL250. Passing FL260, we were cleared to FL240. Descending through FL250, ZLA said to maintain FL250. We acknowledged FL250, then tried to call several times to advise them we had already descended below FL250. We had been descending at 3000 FPM and, by the time we were able to reverse the descent, we had descended to FL243. Later, las approach control advised us to call the ZLA supervisor. The supervisor said the controller had tried to contact us twice, prior to our acknowledgement, to maintain FL250. We did not hear those xmissions. There were no traffic conflicts.
Original NASA ASRS Text
Title: A B737-300 CAPT RPTED THAT ZLA REQUESTED A LEVELOFF AT AN ALT THAT THE FLT HAD ALREADY PASSED DURING APCH TO LAS.
Narrative: DURING DSCNT INTO LAS ON THE KEPEC 1 ARR, WE WERE INITIALLY CLRED TO FL250. PASSING FL260, WE WERE CLRED TO FL240. DSNDING THROUGH FL250, ZLA SAID TO MAINTAIN FL250. WE ACKNOWLEDGED FL250, THEN TRIED TO CALL SEVERAL TIMES TO ADVISE THEM WE HAD ALREADY DSNDED BELOW FL250. WE HAD BEEN DSNDING AT 3000 FPM AND, BY THE TIME WE WERE ABLE TO REVERSE THE DSCNT, WE HAD DSNDED TO FL243. LATER, LAS APCH CTL ADVISED US TO CALL THE ZLA SUPVR. THE SUPVR SAID THE CTLR HAD TRIED TO CONTACT US TWICE, PRIOR TO OUR ACKNOWLEDGEMENT, TO MAINTAIN FL250. WE DID NOT HEAR THOSE XMISSIONS. THERE WERE NO TFC CONFLICTS.
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.