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B757 flight crew correctly programs FMC for the KOOLY1 RNAV in to phx then misreads arrival and attempts to cross basha at 6000 feet instead of 8000 feet.
| Attributes | |
| ACN | 780482 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : phx.airport |
| State Reference | AZ |
| Altitude | msl single value : 6300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : p50.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : vacating altitude |
| Route In Use | arrival star : kooly |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 240 flight time total : 10000 flight time type : 3000 |
| ASRS Report | 780482 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 120 flight time total : 9000 flight time type : 5000 |
| ASRS Report | 779968 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Company |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Approaching phx on the kooly 1 RNAV; ATC gave us a descend via with a leveloff altitude of 11000 ft. Then cleared us direct unila and descend via. We were on profile. I misread altitude at basha to be 6000 ft versus 8000 ft. I realized we would not make basha at 6000 ft. Selected flight level change to increase descent rate. Over basha we were descending through 6300 ft. ATC asked our altitude. We stated 6300 ft. ATC informed us we were below the crossing altitude of 8000 ft at basha. ATC stated the deviation caused no conflict. I believe the event occurred as a result of fatigue. We had a very early report (very early wake-up) with a long duty day of 12 hours. Poor night's sleep prior to the trip start added to the fatigue level.
Original NASA ASRS Text
Title: B757 FLT CREW CORRECTLY PROGRAMS FMC FOR THE KOOLY1 RNAV IN TO PHX THEN MISREADS ARRIVAL AND ATTEMPTS TO CROSS BASHA AT 6000 FEET INSTEAD OF 8000 FEET.
Narrative: APCHING PHX ON THE KOOLY 1 RNAV; ATC GAVE US A DSND VIA WITH A LEVELOFF ALT OF 11000 FT. THEN CLRED US DIRECT UNILA AND DSND VIA. WE WERE ON PROFILE. I MISREAD ALT AT BASHA TO BE 6000 FT VERSUS 8000 FT. I REALIZED WE WOULD NOT MAKE BASHA AT 6000 FT. SELECTED FLT LEVEL CHANGE TO INCREASE DSCNT RATE. OVER BASHA WE WERE DSNDING THROUGH 6300 FT. ATC ASKED OUR ALT. WE STATED 6300 FT. ATC INFORMED US WE WERE BELOW THE XING ALT OF 8000 FT AT BASHA. ATC STATED THE DEV CAUSED NO CONFLICT. I BELIEVE THE EVENT OCCURRED AS A RESULT OF FATIGUE. WE HAD A VERY EARLY RPT (VERY EARLY WAKE-UP) WITH A LONG DUTY DAY OF 12 HRS. POOR NIGHT'S SLEEP PRIOR TO THE TRIP START ADDED TO THE FATIGUE LEVEL.
Data retrieved from NASA's ASRS site as of May 2009 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.