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MD80. S46 approach controller cleared an air carrier crew to descend to lower altitude. He later questioned the crew's descent to the cleared altitude.
| Attributes | |
| ACN | 511750 |
| Time | |
| Date | 200105 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zse.artcc |
| State Reference | WA |
| Altitude | msl bound lower : 10000 msl bound upper : 10500 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : chins |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 511750 |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other |
| Resolutory Action | controller : issued alert flight crew : returned to original clearance |
| Consequence | other |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Possible fly through of assigned altitude. While on our descent into seattle on the CHINS2 arrival between snomy and aubrn, we were cleared to 10000 ft. Descending through about 10500 ft, our controller called us to descend and maintain 7000 ft. We read the new altitude back and reset the altitude window on the flight guidance panel to 7000 ft. Descending through 9100 ft, our controller called 'air carrier X, your assigned altitude was 10000 ft.' we acknowledged his call and climbed back to 10000 ft. The rest of our arrival and approach was uneventful.
Original NASA ASRS Text
Title: MD80. S46 APCH CTLR CLRED AN ACR CREW TO DSND TO LOWER ALT. HE LATER QUESTIONED THE CREW'S DSCNT TO THE CLRED ALT.
Narrative: POSSIBLE FLY THROUGH OF ASSIGNED ALT. WHILE ON OUR DSCNT INTO SEATTLE ON THE CHINS2 ARR BTWN SNOMY AND AUBRN, WE WERE CLRED TO 10000 FT. DSNDING THROUGH ABOUT 10500 FT, OUR CTLR CALLED US TO DSND AND MAINTAIN 7000 FT. WE READ THE NEW ALT BACK AND RESET THE ALT WINDOW ON THE FLT GUIDANCE PANEL TO 7000 FT. DSNDING THROUGH 9100 FT, OUR CTLR CALLED 'ACR X, YOUR ASSIGNED ALT WAS 10000 FT.' WE ACKNOWLEDGED HIS CALL AND CLBED BACK TO 10000 FT. THE REST OF OUR ARR AND APCH WAS UNEVENTFUL.
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.