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Flight crew of an medium large transport overshot assigned descent altitude due to misunderstanding of assigned altitude.
| Attributes | |
| ACN | 318110 |
| Time | |
| Date | 199510 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 10500 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | 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 : 75 flight time total : 7500 flight time type : 3000 |
| ASRS Report | 318110 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While being vectored to downwind at atlanta, the controller (atl approach) gave us a heading, altitude, and airspeed change. We perceived the altitude to be 10000 ft. As we descended through 10700 ft, the controller said 'air carrier X, 11000 ft please.' we climbed back to 11000 ft. There were no conflicts that we were aware of. We never figured out if the controller had changed his mind or we had misinterpreted the altitude in the first place. Given the volume of traffic at atlanta approach, I'm surprised there aren't more errors.
Original NASA ASRS Text
Title: FLC OF AN MLG OVERSHOT ASSIGNED DSCNT ALT DUE TO MISUNDERSTANDING OF ASSIGNED ALT.
Narrative: WHILE BEING VECTORED TO DOWNWIND AT ATLANTA, THE CTLR (ATL APCH) GAVE US A HDG, ALT, AND AIRSPD CHANGE. WE PERCEIVED THE ALT TO BE 10000 FT. AS WE DSNDED THROUGH 10700 FT, THE CTLR SAID 'ACR X, 11000 FT PLEASE.' WE CLBED BACK TO 11000 FT. THERE WERE NO CONFLICTS THAT WE WERE AWARE OF. WE NEVER FIGURED OUT IF THE CTLR HAD CHANGED HIS MIND OR WE HAD MISINTERPRETED THE ALT IN THE FIRST PLACE. GIVEN THE VOLUME OF TFC AT ATLANTA APCH, I'M SURPRISED THERE AREN'T MORE ERRORS.
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.