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After receiving a crossing clearance 50W of bdf at FL240; the flight crew of a B737-700 failed to monitor autoflight performance and crossed at FL280.
| Attributes | |
| ACN | 1017416 |
| Time | |
| Date | 201206 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | MDW.Airport |
| State Reference | IL |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR MOTIF4 |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | First Officer |
| Experience | Flight Crew Last 90 Days 166 |
| Person 2 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Clearance |
Narrative:
We had the FMC programmed with the correct altitudes for the motif 4 arrival into mdw. We were given our initial descent from FL390 to FL330. During the descent; we were given a crossing restriction of 50 west of bfd at FL240. I put FL240 in the MCP and programmed the crossing restriction in the FMC. The aircraft was in a 1000 fpm descent as we were still below the path. At FL280 chicago center called and asked where we were. We responded FL280 with the restriction of FL240 50 west of bfd. I then noticed that we had left VNAV path and had arrived at the restriction of 50 west of bfd 4;000 ft high.
Original NASA ASRS Text
Title: After receiving a crossing clearance 50W of BDF at FL240; the flight crew of a B737-700 failed to monitor autoflight performance and crossed at FL280.
Narrative: We had the FMC programmed with the correct altitudes for the MOTIF 4 Arrival into MDW. We were given our initial descent from FL390 to FL330. During the descent; we were given a crossing restriction of 50 west of BFD at FL240. I put FL240 in the MCP and programmed the crossing restriction in the FMC. The aircraft was in a 1000 fpm descent as we were still below the path. At FL280 Chicago Center called and asked where we were. We responded FL280 with the restriction of FL240 50 west of BFD. I then noticed that we had left VNAV PATH and had arrived at the restriction of 50 west of BFD 4;000 FT high.
Data retrieved from NASA's ASRS site as of July 2013 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.