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B727 cargo aircraft, cleared to descend to 12000 ft, overshot to 11500 ft due to rate of descent and captain thinking they were cleared to 11000 ft.
| Attributes | |
| ACN | 353287 |
| Time | |
| Date | 199611 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : crg airport : jax |
| State Reference | FL |
| Altitude | msl bound lower : 11500 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 45 flight time total : 6500 flight time type : 1500 |
| ASRS Report | 353287 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 3000 |
| ASRS Report | 353540 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were given a clearance to descend to 12000 ft 50 mi northwest of craig VOR. (The altitude selector was set at 12000 ft.) at the time of leveloff, we were given a TA and our attention was outside the aircraft. Because of the rapid rate of descent, and captain thinking we were to descend to 11000 ft, we were unable to stop our descent at 12000 ft and momentarily descend to approximately 11500 ft. At which time we quickly climbed back to 12000 ft and ATC then cleared us down to 2000 ft. I believe that the time of day (early morning) and the duty time (10 hours 5 mins) was a major factor.
Original NASA ASRS Text
Title: B727 CARGO ACFT, CLRED TO DSND TO 12000 FT, OVERSHOT TO 11500 FT DUE TO RATE OF DSCNT AND CAPT THINKING THEY WERE CLRED TO 11000 FT.
Narrative: WE WERE GIVEN A CLRNC TO DSND TO 12000 FT 50 MI NW OF CRAIG VOR. (THE ALT SELECTOR WAS SET AT 12000 FT.) AT THE TIME OF LEVELOFF, WE WERE GIVEN A TA AND OUR ATTN WAS OUTSIDE THE ACFT. BECAUSE OF THE RAPID RATE OF DSCNT, AND CAPT THINKING WE WERE TO DSND TO 11000 FT, WE WERE UNABLE TO STOP OUR DSCNT AT 12000 FT AND MOMENTARILY DSND TO APPROX 11500 FT. AT WHICH TIME WE QUICKLY CLBED BACK TO 12000 FT AND ATC THEN CLRED US DOWN TO 2000 FT. I BELIEVE THAT THE TIME OF DAY (EARLY MORNING) AND THE DUTY TIME (10 HRS 5 MINS) WAS A MAJOR FACTOR.
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.