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Flight crew of an air carrier medium large transport overshot descent altitude causing conflict with another aircraft that ATC vectored away from rptrs. Both rptrs believed that they heard, set in altitude alert and acknowledged clearance correctly. However, approach controller advised that they had overshot assigned altitude.
| Attributes | |
| ACN | 427048 |
| Time | |
| Date | 199901 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : abq |
| State Reference | NM |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 270 flight time type : 270 |
| ASRS Report | 427048 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 210 flight time total : 32000 flight time type : 23000 |
| ASRS Report | 426278 |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
During descent into abq airport, we received a clearance to descend to 9000 ft. We read back 9000 ft, set 9000 ft on altitude window and descended to 9000 ft. After 1 to 2 mins at 9000 ft, the abq approach controller asked our altitude and we replied 9000 ft. Controller said our clearance had been to 10000 ft. We asked if we needed to climb to 10000 ft, controller answered, 'no stay at 9000 ft.' the controller then vectored departing airliner behind our aircraft. No evasive action was taken by either aircraft. No TCASII RA was received. Approach controller never corrected our readback to descend to 9000 ft.
Original NASA ASRS Text
Title: FLC OF AN ACR MLG OVERSHOT DSCNT ALT CAUSING CONFLICT WITH ANOTHER ACFT THAT ATC VECTORED AWAY FROM RPTRS. BOTH RPTRS BELIEVED THAT THEY HEARD, SET IN ALT ALERT AND ACKNOWLEDGED CLRNC CORRECTLY. HOWEVER, APCH CTLR ADVISED THAT THEY HAD OVERSHOT ASSIGNED ALT.
Narrative: DURING DSCNT INTO ABQ ARPT, WE RECEIVED A CLRNC TO DSND TO 9000 FT. WE READ BACK 9000 FT, SET 9000 FT ON ALT WINDOW AND DSNDED TO 9000 FT. AFTER 1 TO 2 MINS AT 9000 FT, THE ABQ APCH CTLR ASKED OUR ALT AND WE REPLIED 9000 FT. CTLR SAID OUR CLRNC HAD BEEN TO 10000 FT. WE ASKED IF WE NEEDED TO CLB TO 10000 FT, CTLR ANSWERED, 'NO STAY AT 9000 FT.' THE CTLR THEN VECTORED DEPARTING AIRLINER BEHIND OUR ACFT. NO EVASIVE ACTION WAS TAKEN BY EITHER ACFT. NO TCASII RA WAS RECEIVED. APCH CTLR NEVER CORRECTED OUR READBACK TO DSND TO 9000 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.