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Pct controller experienced near operational error as minimally spaced departures conflict with each other as turns are issued.
| Attributes | |
| ACN | 667660 |
| Time | |
| Date | 200508 |
| Place | |
| Locale Reference | airport : bwi.airport |
| State Reference | MD |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pct.tracon tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : bwi.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar pilot : instrument |
| Experience | controller radar : 10 flight time total : 254 |
| ASRS Report | 667660 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 13860 vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Air carrier X departed bwi airport; runway heading. I climbed the aircraft to 12000 ft. Air carrier Y departed 3 mi in trail of air carrier X and I climbed him to 12000 ft. Air carrier Y was on a 120 degree heading. Air carrier X was on a 150 degree heading. Due to opposite direction overflt at 6000 ft; I turned air carrier Y to a 130 degree heading. I then turned air carrier X direct paleo. Air carrier X turned to a 075 degree heading to proceed direct paleo. Air carrier Y and air carrier X were now converging; climbing to the same altitude. I noticed the conflict and turned air carrier X right to 130 degree heading and air carrier Y left to 070 degrees. I instructed air carrier Y to descend to 10000 ft immediately. Air carrier Y said he was having a TCASII RA and was climbing.
Original NASA ASRS Text
Title: PCT CTLR EXPERIENCED NEAR OPERROR AS MINIMALLY SPACED DEPS CONFLICT WITH EACH OTHER AS TURNS ARE ISSUED.
Narrative: ACR X DEPARTED BWI ARPT; RWY HDG. I CLBED THE ACFT TO 12000 FT. ACR Y DEPARTED 3 MI IN TRAIL OF ACR X AND I CLBED HIM TO 12000 FT. ACR Y WAS ON A 120 DEG HDG. ACR X WAS ON A 150 DEG HDG. DUE TO OPPOSITE DIRECTION OVERFLT AT 6000 FT; I TURNED ACR Y TO A 130 DEG HDG. I THEN TURNED ACR X DIRECT PALEO. ACR X TURNED TO A 075 DEG HDG TO PROCEED DIRECT PALEO. ACR Y AND ACR X WERE NOW CONVERGING; CLBING TO THE SAME ALT. I NOTICED THE CONFLICT AND TURNED ACR X R TO 130 DEG HDG AND ACR Y L TO 070 DEGS. I INSTRUCTED ACR Y TO DSND TO 10000 FT IMMEDIATELY. ACR Y SAID HE WAS HAVING A TCASII RA AND WAS CLBING.
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.