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Crew read the STAR restrs incorrectly and descended below crossing restr on the olm pt olm 2 at sea, wa.
| Attributes | |
| ACN | 471031 |
| Time | |
| Date | 200004 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sea.airport |
| State Reference | WA |
| Altitude | msl single value : 15000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : s46.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : intermediate altitude descent : approach |
| Route In Use | arrival star : olm.olm2 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 471031 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| ASRS Report | 471030 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance other |
| Supplementary | |
| Problem Areas | Chart Or Publication Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Captain was flying olm 2 arrival to seattle. Misread the crossing restr at olm. Instead of 16000 ft for aircraft landing south, read 12000 ft (only for aircraft landing north). First officer caught the error at approximately 15000 ft. Notified ZSE immediately. Center mentioned that there were no traffic conflicts, and approved descent to 12000 ft. Aircraft was advised to switch to approach. No further comment.
Original NASA ASRS Text
Title: CREW READ THE STAR RESTRS INCORRECTLY AND DSNDED BELOW XING RESTR ON THE OLM PT OLM 2 AT SEA, WA.
Narrative: CAPT WAS FLYING OLM 2 ARR TO SEATTLE. MISREAD THE XING RESTR AT OLM. INSTEAD OF 16000 FT FOR ACFT LNDG S, READ 12000 FT (ONLY FOR ACFT LNDG N). FO CAUGHT THE ERROR AT APPROX 15000 FT. NOTIFIED ZSE IMMEDIATELY. CTR MENTIONED THAT THERE WERE NO TFC CONFLICTS, AND APPROVED DSCNT TO 12000 FT. ACFT WAS ADVISED TO SWITCH TO APCH. NO FURTHER COMMENT.
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.