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B727 flight crew has a mental image of descending to 7000 ft in N90 airspace. First officer catches the error at 8500 ft and the captain climbs the aircraft back 9000 ft.
| Attributes | |
| ACN | 359660 |
| Time | |
| Date | 199701 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lga |
| State Reference | NY |
| Altitude | msl bound lower : 8500 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 tower : den |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 19000 flight time type : 16000 |
| ASRS Report | 359660 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 4290 flight time type : 2090 |
| ASRS Report | 359646 |
| 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 cleared to descend from 11000 ft to 9000 ft at a point in the arrival when you are normally cleared to 7000 ft. Mentally I thought we were cleared to 7000 ft and discovered the error only after descending through the altitude on the altitude alerter. A timely correction to 9000 ft was made. Complacency and breakdown in crew coordination were contributing factors. Supplemental information from acn 359646: the captain (PF) then noticed that we had descended through our assigned altitude to 8500 ft. We climbed back up to 9000 ft without incident. Because we were flying with a so on his first trip since his IOE, we (the captain and I) were doing a lot more explaining about normal procedures.
Original NASA ASRS Text
Title: B727 FLC HAS A MENTAL IMAGE OF DSNDING TO 7000 FT IN N90 AIRSPACE. FO CATCHES THE ERROR AT 8500 FT AND THE CAPT CLBS THE ACFT BACK 9000 FT.
Narrative: WE WERE CLRED TO DSND FROM 11000 FT TO 9000 FT AT A POINT IN THE ARR WHEN YOU ARE NORMALLY CLRED TO 7000 FT. MENTALLY I THOUGHT WE WERE CLRED TO 7000 FT AND DISCOVERED THE ERROR ONLY AFTER DSNDING THROUGH THE ALT ON THE ALT ALERTER. A TIMELY CORRECTION TO 9000 FT WAS MADE. COMPLACENCY AND BREAKDOWN IN CREW COORD WERE CONTRIBUTING FACTORS. SUPPLEMENTAL INFO FROM ACN 359646: THE CAPT (PF) THEN NOTICED THAT WE HAD DSNDED THROUGH OUR ASSIGNED ALT TO 8500 FT. WE CLBED BACK UP TO 9000 FT WITHOUT INCIDENT. BECAUSE WE WERE FLYING WITH A SO ON HIS FIRST TRIP SINCE HIS IOE, WE (THE CAPT AND I) WERE DOING A LOT MORE EXPLAINING ABOUT NORMAL PROCS.
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.