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Air carrier X climb through occupied altitude had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 245886 |
| Time | |
| Date | 199307 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : mrb |
| State Reference | WV |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iad |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 4 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Experience | controller radar : 8 |
| ASRS Report | 245886 |
| 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 | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 800 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
All aircraft were climbing slowly. Air carrier X slow climbing northbound going overseas, was told to expedite climb through 12000 ft on his way to 17000 ft on a vector to join J220. Air carrier Y with TCASII on EMI2 arrival to bwi was expediting descent to 11000 ft to get underneath air carrier X. I got distracted and failed to ensure separation between these 2 aircraft. Air carrier Y first noticed air carrier X coming at him and asked if I had aircraft on radar. I tried to separate the 2 aircraft but I think air carrier Y climbed on a TCASII RA alert and I think air carrier X turned to go behind air carrier Y. I was very shaken afterward. Thank goodness the pilots saw each other.
Original NASA ASRS Text
Title: ACR X CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: ALL ACFT WERE CLBING SLOWLY. ACR X SLOW CLBING NBOUND GOING OVERSEAS, WAS TOLD TO EXPEDITE CLB THROUGH 12000 FT ON HIS WAY TO 17000 FT ON A VECTOR TO JOIN J220. ACR Y WITH TCASII ON EMI2 ARR TO BWI WAS EXPEDITING DSCNT TO 11000 FT TO GET UNDERNEATH ACR X. I GOT DISTRACTED AND FAILED TO ENSURE SEPARATION BTWN THESE 2 ACFT. ACR Y FIRST NOTICED ACR X COMING AT HIM AND ASKED IF I HAD ACFT ON RADAR. I TRIED TO SEPARATE THE 2 ACFT BUT I THINK ACR Y CLBED ON A TCASII RA ALERT AND I THINK ACR X TURNED TO GO BEHIND ACR Y. I WAS VERY SHAKEN AFTERWARD. THANK GOODNESS THE PLTS SAW EACH OTHER.
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.