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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier X climb through occupied altitude had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 263257 |
| Time | |
| Date | 199402 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : hgr |
| State Reference | MO |
| Altitude | msl bound lower : 21000 msl bound upper : 21000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 18 |
| ASRS Report | 263257 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 28500 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Vectored trailing air carrier X off course to allow the other to get requested altitude. When 9 mi apart, turned trailing air carrier X back to join airway. Trailing air carrier X gained speed and crossed less than 5 mi behind air carrier Y. The reason for increased speed was strong winds out of the west. When conflict was noticed, I called next sector to stop front air carrier X climb but was unable.
Original NASA ASRS Text
Title: ACR X CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: VECTORED TRAILING ACR X OFF COURSE TO ALLOW THE OTHER TO GET REQUESTED ALT. WHEN 9 MI APART, TURNED TRAILING ACR X BACK TO JOIN AIRWAY. TRAILING ACR X GAINED SPD AND CROSSED LESS THAN 5 MI BEHIND ACR Y. THE REASON FOR INCREASED SPD WAS STRONG WINDS OUT OF THE W. WHEN CONFLICT WAS NOTICED, I CALLED NEXT SECTOR TO STOP FRONT ACR X CLB BUT WAS UNABLE.
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.