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Air carrier X multiple runway operation parallel runways had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 259228 |
| Time | |
| Date | 199312 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : msp |
| State Reference | MN |
| Altitude | msl bound lower : 1700 msl bound upper : 1700 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : msp tower : msp tower : jfk |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : initial |
| 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 |
| Flight Phase | climbout : initial |
| 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 : 190 flight time total : 6000 flight time type : 500 |
| ASRS Report | 259228 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 13500 flight time type : 1500 |
| ASRS Report | 258944 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure non adherence : clearance other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Error |
Narrative:
Departing runway 29L, assigned runway heading. Air carrier Y that had departed runway 29R was spotted and appeared to be converging on our departure course just as we encountered IMC conditions. Tower inquired if we had the traffic in sight and we replied negative about the same time as our TCASII issued an alert. Tower issued a turn to 270 degrees about the same time as our TCASII issued a traffic RA to descend. We stopped our climb and initiated a descent coming within 200 ft vertical and 1 mi lateral of the traffic at the closest point. We advised departure control of the RA and inquired if he was aware of the conflict. He advised that tower was working the flight which should have been diverging from our course. Subsequent discussion with msp tower personnel revealed the aircraft that departed runway 29R was given instructions to maintain runway heading. It was speculated that the strong northerly winds and differences in performance caused the eventual conflict with our aircraft (radar plot indicated as close as 6/10 mi and 300 ft vertical).
Original NASA ASRS Text
Title: ACR X MULTIPLE RWY OP PARALLEL RWYS HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: DEPARTING RWY 29L, ASSIGNED RWY HDG. ACR Y THAT HAD DEPARTED RWY 29R WAS SPOTTED AND APPEARED TO BE CONVERGING ON OUR DEP COURSE JUST AS WE ENCOUNTERED IMC CONDITIONS. TWR INQUIRED IF WE HAD THE TFC IN SIGHT AND WE REPLIED NEGATIVE ABOUT THE SAME TIME AS OUR TCASII ISSUED AN ALERT. TWR ISSUED A TURN TO 270 DEGS ABOUT THE SAME TIME AS OUR TCASII ISSUED A TFC RA TO DSND. WE STOPPED OUR CLB AND INITIATED A DSCNT COMING WITHIN 200 FT VERT AND 1 MI LATERAL OF THE TFC AT THE CLOSEST POINT. WE ADVISED DEP CTL OF THE RA AND INQUIRED IF HE WAS AWARE OF THE CONFLICT. HE ADVISED THAT TWR WAS WORKING THE FLT WHICH SHOULD HAVE BEEN DIVERGING FROM OUR COURSE. SUBSEQUENT DISCUSSION WITH MSP TWR PERSONNEL REVEALED THE ACFT THAT DEPARTED RWY 29R WAS GIVEN INSTRUCTIONS TO MAINTAIN RWY HDG. IT WAS SPECULATED THAT THE STRONG NORTHERLY WINDS AND DIFFERENCES IN PERFORMANCE CAUSED THE EVENTUAL CONFLICT WITH OUR ACFT (RADAR PLOT INDICATED AS CLOSE AS 6/10 MI AND 300 FT VERT).
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.