TRACON controllers reported a loss of separation while working combined positions due to staffing an...

Attributes
ACN	1759113
Time
Date	202009
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 2.5
Person 2
Function	Approach
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Narrative:

I had just taken the X and Y sectors from Z position during configuration #X (a configuration that we rarely use and I haven't worked in at least 8 months) and did a recorded briefing. During briefing I took point outs from Z sector on 2 aircraft. One was aircraft X who was on right downwind for runway xr. Aircraft X was yellow as a point out on my scope. I was talking to aircraft Y who was in trail of aircraft X and descended him to the MVA of XXX. I then was setting up preferences and frequencies for the sector. The Z controller was late turning base and I didn't notice. I turned base at my normal base turn not noticing that aircraft X had turned a late base. When I noticed the mistake both aircraft were at same altitude and I immediately issued traffic alert to aircraft Y and he reported responding to an RA and climbed. During that time after the loss of separation the Z controller got visual separation from aircraft X. I turned aircraft Y to the northeast and set him back up for a right base to xr. Both landed without further incident.I shouldn't have taken a point out on aircraft who was still on downwind. Also I felt a little rusty on the configuration as we rarely use it. Also with the covid staffing I have been working mostly mid shifts and hadn't adjusted the sleep patterns well enough and hadn't worked the busier traffic for a while.

Original NASA ASRS Text

Title: TRACON Controllers reported a loss of separation while working combined positions due to staffing and handoff/communication issues. The First Officer of one of the aircrafts involved also reported the conflict and made reference to the miss-communication between controllers.

Narrative: I had just taken the X and Y sectors from Z position during Configuration #X (A configuration that we rarely use and I haven't worked in at least 8 months) and did a recorded briefing. During briefing I took point outs from Z sector on 2 aircraft. One was Aircraft X who was on right downwind for Runway XR. Aircraft X was yellow as a point out on my scope. I was talking to Aircraft Y who was in trail of Aircraft X and descended him to the MVA of XXX. I then was setting up preferences and frequencies for the sector. The Z Controller was late turning base and I didn't notice. I turned base at my normal base turn not noticing that Aircraft X had turned a late base. When I noticed the mistake both aircraft were at same altitude and I immediately issued traffic alert to Aircraft Y and he reported responding to an RA and climbed. During that time after the loss of separation the Z Controller got visual separation from Aircraft X. I turned Aircraft Y to the northeast and set him back up for a right base to XR. Both landed without further incident.I shouldn't have taken a point out on aircraft who was still on downwind. Also I felt a little rusty on the configuration as we rarely use it. Also with the COVID staffing I have been working mostly mid shifts and hadn't adjusted the sleep patterns well enough and hadn't worked the busier traffic for a while.

Data retrieved from NASA's ASRS site 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.

TRACON controllers reported a loss of separation while working combined positions due to staffing and handoff/communication issues. The first officer of one of the aircrafts involved also reported the conflict and made reference to the miss-communication between controllers.