Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 1.5
Human-Machine Interface
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance; Air Traffic Control Separated Traffic; Flight Crew Took Evasive Action; Flight Crew Returned To Clearance
Human Factors
I was working a radar position without a D-side as one was not needed. Aircraft Y was heading southeast; direct CUTTA Intersection at FL350. Aircraft X was heading northwest toward MLP at FL340. The paths of flight of the two aircraft were less than 5 miles apart. Aircraft Y's data block showed FL345 in one hit and the conflict alert initiated. I asked Aircraft Y to verify level at FL350. The pilot responded; indicating that they were responding to an RA and descending. After verifying that the RA was to descend and not climb; I noticed another sector had an aircraft; Aircraft Z; at FL360 that had shown 100 feet low for a couple hits; causing the RA. The RA resulted in a loss of separation between Aircraft Y and Aircraft X. Once Aircraft Y and Aircraft X were laterally separated; I cleared Aircraft Y to descend to FL310 once the RA was resolved as the aircraft needed to start it's descent into it's destination airport. Aircraft Z should have been level at FL360. I'm not sure if it was a pilot or equipment error; but the only separation that was lost was with another aircraft not involved in the RA at all.
Reporter stated he observed Aircraft Y deviate from assigned altitude because of RA from Aircraft Z; causing separation loss with Aircraft X.