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An ATC question regarding an air carrier's descent rate caused the flight crew to later check published STAR. The reporter states that similar sounding cross restrs may have led to the undershoot of a clearance restr.
| Attributes | |
| ACN | 304850 |
| Time | |
| Date | 199505 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : iah |
| State Reference | TX |
| Altitude | msl bound lower : 10000 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu tower : azo |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zhu |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 7000 flight time type : 1600 |
| ASRS Report | 304850 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Descending via bastn 3 arrival ATC may have requested we cross 'bumby' at 10000 ft, however, we believe we were told 'genbe' at 10000 ft. At about 13000 ft ATC asked us our descent rate (between 3000 to 3500 FPM) and due to this question we later double-checked the arrival and noted that 10000 ft is normally 'to be expected' at bumby intersection we should have been more alert to this 'expected' altitude and questioned ATC when we heard genbe as to avoid any possible confusion.
Original NASA ASRS Text
Title: AN ATC QUESTION REGARDING AN ACR'S DSCNT RATE CAUSED THE FLC TO LATER CHK PUBLISHED STAR. THE RPTR STATES THAT SIMILAR SOUNDING CROSS RESTRS MAY HAVE LED TO THE UNDERSHOOT OF A CLRNC RESTR.
Narrative: DSNDING VIA BASTN 3 ARR ATC MAY HAVE REQUESTED WE CROSS 'BUMBY' AT 10000 FT, HOWEVER, WE BELIEVE WE WERE TOLD 'GENBE' AT 10000 FT. AT ABOUT 13000 FT ATC ASKED US OUR DSCNT RATE (BTWN 3000 TO 3500 FPM) AND DUE TO THIS QUESTION WE LATER DOUBLE-CHKED THE ARR AND NOTED THAT 10000 FT IS NORMALLY 'TO BE EXPECTED' AT BUMBY INTXN WE SHOULD HAVE BEEN MORE ALERT TO THIS 'EXPECTED' ALT AND QUESTIONED ATC WHEN WE HEARD GENBE AS TO AVOID ANY POSSIBLE CONFUSION.
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.