 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ZDC controller experienced operational error at approximately FL250 during heavy/complex traffic when one aircraft failed to acknowledge turn; delaying controller actions.
| Attributes | |
| ACN | 760030 |
| Time | |
| Date | 200710 |
| Place | |
| Locale Reference | navaid : ccv.vortac |
| State Reference | VA |
| Altitude | msl bound lower : 25000 msl bound upper : 26000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 135 ER&LR |
| 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 : 2 |
| ASRS Report | 760030 |
| 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 |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 13200 vertical : 800 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Busy sector; multiple head on climbing and descending and sequencing for many airports. Issued aircraft #2 direct fkn multiple times. Nothing heard. Issued aircraft #1 descent clearance from FL290 to FL230. Turned aircraft #2; 30 degrees to the right. Aircraft never responded; but turned anyways. Aircraft then questioned turn. Aircraft was then instructed 60 degrees turn left. Aircraft turned left into other aircraft. Aircraft #1 should have acknowledged right turn. If this had been done; I would not have tried to turn him left; consequently turning him back into other aircraft.
Original NASA ASRS Text
Title: ZDC CTLR EXPERIENCED OPERROR AT APPROX FL250 DURING HEAVY/COMPLEX TFC WHEN ONE ACFT FAILED TO ACKNOWLEDGE TURN; DELAYING CTLR ACTIONS.
Narrative: BUSY SECTOR; MULTIPLE HEAD ON CLBING AND DSNDING AND SEQUENCING FOR MANY ARPTS. ISSUED ACFT #2 DIRECT FKN MULTIPLE TIMES. NOTHING HEARD. ISSUED ACFT #1 DSCNT CLRNC FROM FL290 TO FL230. TURNED ACFT #2; 30 DEGS TO THE R. ACFT NEVER RESPONDED; BUT TURNED ANYWAYS. ACFT THEN QUESTIONED TURN. ACFT WAS THEN INSTRUCTED 60 DEGS TURN L. ACFT TURNED L INTO OTHER ACFT. ACFT #1 SHOULD HAVE ACKNOWLEDGED R TURN. IF THIS HAD BEEN DONE; I WOULD NOT HAVE TRIED TO TURN HIM L; CONSEQUENTLY TURNING HIM BACK INTO OTHER ACFT.
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.