<< >> NASA ASRS Report 1018113, June 2012

Enroute controller assigned a d-side witnessed a loss of separation when the radar controller reportedly overlooked known traffic.

Attributes
ACN	1018113
Time
Date	201206
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Aircraft 2
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict

Narrative:

A crj was on route; southwest bound on J6 and was traffic with a north bound aircraft at FL360. The radar controller was shown this conflict via uret. Due to tech center issues; the sia (system information area) was down and all in-trail spacing was being posted manually by the d-sides. As this was happening the r-side descended the crj to FL340 overlooking the fact the embraer was in close proximity at FL350 northbound. By the time the r-side realized his error; separation had already been lost. Radar simply got complacent and overlooked known traffic.

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Original NASA ASRS Text

Title: Enroute Controller assigned a D-Side witnessed a loss of separation when the RADAR Controller reportedly overlooked known traffic.

Narrative: A CRJ was on route; southwest bound on J6 and was traffic with a north bound aircraft at FL360. The RADAR controller was shown this conflict via URET. Due to Tech Center issues; the SIA (System Information Area) was down and all in-trail spacing was being posted manually by the D-Sides. As this was happening the R-Side descended the CRJ to FL340 overlooking the fact the Embraer was in close proximity at FL350 northbound. By the time the R-Side realized his error; separation had already been lost. RADAR simply got complacent and overlooked known traffic.

Data retrieved from NASA's ASRS site as of July 2013 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.