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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier X had less than standard separation from air carrier Y. Evasive action taken. System error.
| Attributes | |
| ACN | 183612 |
| Time | |
| Date | 199107 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dxo |
| State Reference | MI |
| Altitude | msl bound lower : 6000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dtw |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6200 flight time type : 900 |
| ASRS Report | 183612 |
| 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 | controller : issued new clearance other |
| Consequence | faa : investigated faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 12000 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X inbound to land dtw runway 21L from around spica intersection on radar vectors, heading 240 degree. Approach control gave us a descent to 6000 ft and a right turn heading 030 degree. Just prior to reaching the 030 degree heading, approach gave us a further right turn to a 050 degree (with a somewhat 'excited' voice). As we rolled out air carrier Y passed from right to left about 700 ft above us descending through our altitude about 1-2 1/2 mi in front. We made an immediate climbing right turn so as to pass behind air carrier Y. On the ground we called approach control and they said it was basically a mistake on the controller's part and that it wasn't planned that way. As evidenced already by the incidents and accidents at dtw, I strongly feel both the airspace/airport and controllers/pilots are over-utilized and taxed. The controllers continually exhibit an intense desire not to modify or adjust any procedure for any circumstances.
Original NASA ASRS Text
Title: ACR X HAD LTSS FROM ACR Y. EVASIVE ACTION TAKEN. SYS ERROR.
Narrative: ACR X INBOUND TO LAND DTW RWY 21L FROM AROUND SPICA INTXN ON RADAR VECTORS, HDG 240 DEG. APCH CTL GAVE US A DSCNT TO 6000 FT AND A R TURN HDG 030 DEG. JUST PRIOR TO REACHING THE 030 DEG HDG, APCH GAVE US A FURTHER R TURN TO A 050 DEG (WITH A SOMEWHAT 'EXCITED' VOICE). AS WE ROLLED OUT ACR Y PASSED FROM R TO L ABOUT 700 FT ABOVE US DSNDING THROUGH OUR ALT ABOUT 1-2 1/2 MI IN FRONT. WE MADE AN IMMEDIATE CLBING R TURN SO AS TO PASS BEHIND ACR Y. ON THE GND WE CALLED APCH CTL AND THEY SAID IT WAS BASICALLY A MISTAKE ON THE CTLR'S PART AND THAT IT WASN'T PLANNED THAT WAY. AS EVIDENCED ALREADY BY THE INCIDENTS AND ACCIDENTS AT DTW, I STRONGLY FEEL BOTH THE AIRSPACE/ARPT AND CTLRS/PLTS ARE OVER-UTILIZED AND TAXED. THE CTLRS CONTINUALLY EXHIBIT AN INTENSE DESIRE NOT TO MODIFY OR ADJUST ANY PROC FOR ANY CIRCUMSTANCES.
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.