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An md-83 flight crew failed to comply with the crossing restriction at vnnom when flying the egul RNAV STAR to phx.
| Attributes | |
| ACN | 1041326 |
| Time | |
| Date | 201210 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | PHX.Airport |
| State Reference | AZ |
| Aircraft 1 | |
| Make Model Name | MD-83 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR EAGUL |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Speed All Types |
Narrative:
On STAR to phx cleared to descend via the egul RNAV STAR; landing runway 26. The captain was flying pilot and selected VNAV on the FMS aircraft. VNAV made all crossings prior to vnmom then suddenly could not keep up with the steep descent needed from homrr to vnmom. We both noticed this and the captain took corrective action but at vnmom we were still 10 KTS fast and 2;500 high. Upon noticing that correction was needed the captain got out of VNAV and made all the other restrictions in vs mode. No indication of any conflict with other aircraft.it is important to gauge descent rates between points on arrival; we had four miles to lose 5;000 ft if we crossed homrr at 16;000 (chart says homrr 16;000 or below).
Original NASA ASRS Text
Title: An MD-83 fLight crew failed to comply with the crossing restriction at VNNOM when flying the EGUL RNAV STAR to PHX.
Narrative: On STAR to PHX cleared to descend via the EGUL RNAV STAR; landing Runway 26. The Captain was flying pilot and selected VNAV on the FMS aircraft. VNAV made all crossings prior to VNMOM then suddenly could not keep up with the steep descent needed from HOMRR to VNMOM. We both noticed this and the Captain took corrective action but at VNMOM we were still 10 KTS fast and 2;500 high. Upon noticing that correction was needed the Captain got out of VNAV and made all the other restrictions in VS mode. No indication of any conflict with other aircraft.It is IMPORTANT TO GAUGE descent rates between points on arrival; we had four miles to lose 5;000 FT if we crossed HOMRR at 16;000 (chart says HOMRR 16;000 or below).
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.