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MD80 cleared to cross a fix at 7000 ft, descended from 7000 ft thinking he was descending from 8000 ft to 7000 ft.
| Attributes | |
| ACN | 354511 |
| Time | |
| Date | 199612 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 6500 msl bound upper : 7000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 354511 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 354510 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude 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 level 7000 ft when approach cleared us 7000 ft until fnuch then cleared ILS runway 22R. The first officer started an immediate descent. By the time I confirmed we were not inside fnuch we were rapidly descending, and at that point I told him to climb back to 7000 ft. Our lowest altitude was 6500 before fnuch. Later, my first officer told me he thought he was at 8000 ft descending to 7000 ft.
Original NASA ASRS Text
Title: MD80 CLRED TO CROSS A FIX AT 7000 FT, DSNDED FROM 7000 FT THINKING HE WAS DSNDING FROM 8000 FT TO 7000 FT.
Narrative: WE WERE LEVEL 7000 FT WHEN APCH CLRED US 7000 FT UNTIL FNUCH THEN CLRED ILS RWY 22R. THE FO STARTED AN IMMEDIATE DSCNT. BY THE TIME I CONFIRMED WE WERE NOT INSIDE FNUCH WE WERE RAPIDLY DSNDING, AND AT THAT POINT I TOLD HIM TO CLB BACK TO 7000 FT. OUR LOWEST ALT WAS 6500 BEFORE FNUCH. LATER, MY FO TOLD ME HE THOUGHT HE WAS AT 8000 FT DSNDING TO 7000 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.