Small Aircraft; Low Wing; 1 Eng; Retractable Gear
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Communication Breakdown; Situational Awareness; Distraction
ATC Issue All Types; Airspace Violation All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Airspace Structure; Procedure
I was just assuming the sector after receiving a briefing from the controller I was relieving. Aircraft X was westbound level at 5000 feet IFR. The pilot of Aircraft X said 'We've finally got that Dash in sight'. I looked at the scope; thinking that he had gotten a DH8A in sight that was still at his 2 o'clock and about 9 miles but was caught off guard when I realized that he probably wasn't talking about that DH8A because it would have been difficult for him to see him at that point. I asked him to repeat and he did. I then noticed a limited data block descending through the altitude of Aircraft X southeast bound. I realized that the Final controller had descended Aircraft Y into my airspace without a point out and had not seen Aircraft X. I believe separation was lost between these two IFR aircraft.By the time I noticed Aircraft Y in my airspace he was already no factor for Aircraft X. He was descending below him and turning southbound away from Aircraft X. I did not need to issue evasive action. This was caused by the Final Controller allowing Aircraft Y to enter my airspace without approval and not recognizing the conflict with Aircraft X. The Final Controller should not enter another controller's airspace without coordination.
PHL TRACON Controller reported that a Controller failed to make a radar point out to the reporter's adjacent sector.