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An MD80 captain; 'descending via' the tammy RNAV STAR into mem where he planned to land to the north; was surprised to have crossed tammy 2;000 ft below the top of its 'between 16;000 ft and 10;000 ft' window only to find himself just two miles from rocab which required crossing 'at 10;000 ft' and 'at 230 KTS'.
| Attributes | |
| ACN | 1048936 |
| Time | |
| Date | 201211 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | MEM.Airport |
| State Reference | TN |
| Aircraft 1 | |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR TAMMY RNAV |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
We were cleared by ATC to descend via the tammy four RNAV STAR. We complied by crossing tammy between 16;000 ft and 10;000 ft; crossing at around 14;000 ft MSL. The next waypoint; rocab; has a crossing restriction (for aircraft landing 36L/C/right) 'at 10;000 ft' and 'at 230 KTS.' we failed to realize that rocab is only 2 miles from tammy; and we thus crossed rocab significantly higher than 10;000 ft. I asked for relief; but did not hear a reply. The remainder of the approach and landing was uneventful.better attention to detail would have served me well here. But; this approach should be modified. At tammy intersection; the plate should read: 'aircraft landing north; cross tammy at 10;000 ft.'
Original NASA ASRS Text
Title: An MD80 Captain; 'descending via' the TAMMY RNAV STAR into MEM where he planned to land to the North; was surprised to have crossed TAMMY 2;000 FT below the top of its 'Between 16;000 FT and 10;000 FT' window only to find himself just two miles from ROCAB which required crossing 'at 10;000 FT' and 'at 230 KTS'.
Narrative: We were cleared by ATC to descend via the TAMMY FOUR RNAV STAR. We complied by crossing TAMMY between 16;000 FT and 10;000 FT; crossing at around 14;000 FT MSL. The next waypoint; ROCAB; has a crossing restriction (for aircraft landing 36L/C/R) 'at 10;000 FT' and 'at 230 KTS.' We failed to realize that ROCAB is only 2 miles from TAMMY; and we thus crossed ROCAB significantly higher than 10;000 FT. I asked for relief; but did not hear a reply. The remainder of the approach and landing was uneventful.Better attention to detail would have served me well here. But; this approach should be modified. At TAMMY Intersection; the plate should read: 'Aircraft Landing North; cross TAMMY at 10;000 FT.'
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.