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ZDC controller experienced operational error at FL360 when incorrect altitude assignment readback was missed.
| Attributes | |
| ACN | 684330 |
| Time | |
| Date | 200601 |
| Place | |
| Locale Reference | atc facility : zdc.artcc |
| State Reference | VA |
| Altitude | msl single value : 36000 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Boeing Company Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Airbus Industrie Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 3 controller time certified in position1 : 1 controller time certified in position2 : 3 flight time total : 250 |
| ASRS Report | 684330 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24600 vertical : 800 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft a was given clearance to descend to FL370. Controller missed bad readback of FL360 from air carrier X. Separation was lost; 2 planes were diverging at the time. There was a lot of coordination done with adjoining sectors to accommodate numerous pilot requests for altitude change due to turbulence.
Original NASA ASRS Text
Title: ZDC CTLR EXPERIENCED OPERROR AT FL360 WHEN INCORRECT ALT ASSIGNMENT READBACK WAS MISSED.
Narrative: ACFT A WAS GIVEN CLRNC TO DSND TO FL370. CTLR MISSED BAD READBACK OF FL360 FROM ACR X. SEPARATION WAS LOST; 2 PLANES WERE DIVERGING AT THE TIME. THERE WAS A LOT OF COORD DONE WITH ADJOINING SECTORS TO ACCOMMODATE NUMEROUS PLT REQUESTS FOR ALT CHANGE DUE TO TURB.
Data retrieved from NASA's ASRS site as of January 2009 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.