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Pct controller experienced operational error at 7000 ft when issuance of speed and descent clrncs were not in time to clear en route traffic.
| Attributes | |
| ACN | 676675 |
| Time | |
| Date | 200510 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : aml.vortac |
| State Reference | VA |
| Altitude | msl single value : 7000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : pct.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Gates Learjet Corp Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | arrival star : jasen |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : pct.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 60 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar controller : military |
| Experience | controller military : 5 controller radar : 13 controller time certified in position2 : 6 |
| ASRS Report | 676675 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 9000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
A pointout was accepted on aircraft X northbound direct martinsburg; wv; at 7000 ft. Aircraft were being sequenced to land at iad airport on the jasen 4 arrival. Aircraft Y was the third aircraft and had to miss V143 traffic; nebound at 9000 ft. Aircraft Y was descended to 6000 ft; slowed to 210 KTS for sequencing. The data block for aircraft X was overlapped by other data blocks; and information for his data block was not visually processed. Separation was lost and aircraft Y was vectored on a 040 degree heading to ensure safety.
Original NASA ASRS Text
Title: PCT CTLR EXPERIENCED OPERROR AT 7000 FT WHEN ISSUANCE OF SPD AND DSCNT CLRNCS WERE NOT IN TIME TO CLR ENRTE TFC.
Narrative: A POINTOUT WAS ACCEPTED ON ACFT X NBOUND DIRECT MARTINSBURG; WV; AT 7000 FT. ACFT WERE BEING SEQUENCED TO LAND AT IAD ARPT ON THE JASEN 4 ARR. ACFT Y WAS THE THIRD ACFT AND HAD TO MISS V143 TFC; NEBOUND AT 9000 FT. ACFT Y WAS DSNDED TO 6000 FT; SLOWED TO 210 KTS FOR SEQUENCING. THE DATA BLOCK FOR ACFT X WAS OVERLAPPED BY OTHER DATA BLOCKS; AND INFO FOR HIS DATA BLOCK WAS NOT VISUALLY PROCESSED. SEPARATION WAS LOST AND ACFT Y WAS VECTORED ON A 040 DEG HDG TO ENSURE SAFETY.
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.