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ZDC controller experienced loss of separation at FL200 when updated data block information did not match altitude assignment issued to pilot.
| Attributes | |
| ACN | 714027 |
| Time | |
| Date | 200610 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bwi.airport |
| State Reference | MD |
| Altitude | msl single value : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B717 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 19 controller time certified in position1 : 4 controller time certified in position2 : 6 |
| ASRS Report | 714027 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 15600 vertical : 800 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Aircraft #1 initially climbed to FL230 (standard altitude). Aircraft #2 turned away from receiving sector due to holding and stuck microphone. Aircraft #2 at FL210. I thought I amended aircraft #1 to FL200. I updated the data block but failed to restate clearance. Traffic information exchanged but aircraft #1 did not recognize the traffic situation. Holding aircraft is not common at this sector and greatly affects complexity.
Original NASA ASRS Text
Title: ZDC CTLR EXPERIENCED LOSS OF SEPARATION AT FL200 WHEN UPDATED DATA BLOCK INFO DID NOT MATCH ALT ASSIGNMENT ISSUED TO PLT.
Narrative: ACFT #1 INITIALLY CLBED TO FL230 (STANDARD ALT). ACFT #2 TURNED AWAY FROM RECEIVING SECTOR DUE TO HOLDING AND STUCK MIKE. ACFT #2 AT FL210. I THOUGHT I AMENDED ACFT #1 TO FL200. I UPDATED THE DATA BLOCK BUT FAILED TO RESTATE CLRNC. TFC INFO EXCHANGED BUT ACFT #1 DID NOT RECOGNIZE THE TFC SITUATION. HOLDING ACFT IS NOT COMMON AT THIS SECTOR AND GREATLY AFFECTS COMPLEXITY.
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.