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Air carrier medium large transport altitude deviation overshot clearance altitude after being given an amended clearance altitude assignment.
| Attributes | |
| ACN | 131100 |
| Time | |
| Date | 198912 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : pie |
| State Reference | FL |
| Altitude | msl bound lower : 27000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 7000 flight time type : 2000 |
| ASRS Report | 131100 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : commercial pilot : instrument pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 |
| ASRS Report | 131377 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation Pilot Deviation other |
Narrative:
I was at cruise at FL330 when I was cleared to descend to FL270 to cross 90 mi northwest of pie VORTAC at FL270. Before descending I was cleared to descend to FL290 'now,' west/O 'amended' altitude clearance. I interpreted this to mean to descend to FL290 'now,' and continue to cross 90 mi from st petersburg at FL270 (since that was an expected altitude and position on the assigned STAR). At FL273, I was advised that the controller had believed she amended my altitude to FL290, but that there was no conflict.
Original NASA ASRS Text
Title: ACR MLG ALT DEVIATION OVERSHOT CLRNC ALT AFTER BEING GIVEN AN AMENDED CLRNC ALT ASSIGNMENT.
Narrative: I WAS AT CRUISE AT FL330 WHEN I WAS CLRED TO DSND TO FL270 TO CROSS 90 MI NW OF PIE VORTAC AT FL270. BEFORE DSNDING I WAS CLRED TO DSND TO FL290 'NOW,' W/O 'AMENDED' ALT CLRNC. I INTERPRETED THIS TO MEAN TO DSND TO FL290 'NOW,' AND CONTINUE TO CROSS 90 MI FROM ST PETERSBURG AT FL270 (SINCE THAT WAS AN EXPECTED ALT AND POS ON THE ASSIGNED STAR). AT FL273, I WAS ADVISED THAT THE CTLR HAD BELIEVED SHE AMENDED MY ALT TO FL290, BUT THAT THERE WAS NO CONFLICT.
Data retrieved from NASA's ASRS site as of August 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.