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When the VNAV path autoflight mode of a B757 was unable to comply with the speed and altitude constraints on the kippr RNAV STAR to den the flight crew intervened with alternate descent and airspeed autopilot modes.
| Attributes | |
| ACN | 1067090 |
| Time | |
| Date | 201302 |
| Place | |
| Locale Reference | ZDV.ARTCC |
| State Reference | CO |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autoflight System |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 70 Flight Crew Total 18600 Flight Crew Type 4000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
ATC told us to descend via the kippr arrival. We attempted to do so using VNAV; but VNAV could not handle the altitudes and speeds. The winds were programmed; but were light and negligible. We had to revert to MCP [speed and path modes] to make the crossings and speeds.
Original NASA ASRS Text
Title: When the VNAV PATH autoflight mode of a B757 was unable to comply with the speed and altitude constraints on the KIPPR RNAV STAR to DEN the flight crew intervened with alternate descent and airspeed autopilot modes.
Narrative: ATC told us to descend via the KIPPR arrival. We attempted to do so using VNAV; but VNAV could not handle the altitudes and speeds. The winds were programmed; but were light and negligible. We had to revert to MCP [speed and path modes] to make the crossings and speeds.
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.