B737 flight crew had a traffic alert during approach to land.

Attributes
ACN	1703487
Time
Date	201911
Local Time Of Day	1201-1800
Place
Locale Reference	EWR.Airport
State Reference	NJ
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 204 Flight Crew Total 2290 Flight Crew Type 2290
Person 2
Function	Pilot Flying Captain
Events
Anomaly	Conflict Airborne Conflict Deviation - Procedural Clearance
Miss Distance	Vertical 500

Narrative:

Level 6;000 feet with approach control. ATC calls out VFR traffic at 11 O'clock and less than 10 miles (I don't recall exact range fallout); 500 ft underneath. I reply that we are searching; but internal to cockpit we note the TCAS contact that meets the fallout. PF (pilot flying) is flying without any autopilot systems for proficiency; but is stable at 6;000 feet. TCAS TA approx 5 miles and -05 becomes -03 while we are level; suggesting a slight climb by the conflict aircraft. ATC still seeks threat and vectors us 10 degrees to the left. Shortly after the turn we receive a TCAS RA and inform ATC we are climbing in accordance with the RA. Shortly after the maneuver is initiated; we identified what appears to be a twin engine VFR aircraft from left to right on the windscreen but below our altitude and approximately 3-5 miles away. It was unclear if the VFR aircraft maneuvered in response to an RA. We advised ATC that the RA had cleared and returned to our assigned altitude; ATC acknowledged and remainder of flight was without incident.

Original NASA ASRS Text

Title: B737 flight crew had a Traffic Alert during approach to land.

Narrative: Level 6;000 feet with approach control. ATC calls out VFR traffic at 11 O'Clock and less than 10 miles (I don't recall exact range fallout); 500 ft underneath. I reply that we are searching; but internal to cockpit we note the TCAS contact that meets the fallout. PF (Pilot Flying) is flying without any autopilot systems for proficiency; but is stable at 6;000 feet. TCAS TA approx 5 miles and -05 becomes -03 while we are level; suggesting a slight climb by the conflict aircraft. ATC still seeks threat and vectors us 10 degrees to the left. Shortly after the turn we receive a TCAS RA and inform ATC we are climbing in accordance with the RA. Shortly after the maneuver is initiated; we identified what appears to be a twin engine VFR aircraft from left to right on the windscreen but below our altitude and approximately 3-5 miles away. It was unclear if the VFR aircraft maneuvered in response to an RA. We advised ATC that the RA had cleared and returned to our assigned altitude; ATC acknowledged and remainder of flight was without incident.

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.