B737 flight crew reported responding to a TCAS resolution advisory due to near mid air collision.

Attributes
ACN	1578428
Time
Date	201809
Local Time Of Day	1801-2400
Place
Locale Reference	N90.TRACON
State Reference	NY
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 142 Flight Crew Total 19214 Flight Crew Type 10714
Events
Anomaly	Conflict NMAC Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance
Miss Distance	Vertical 300

Narrative:

On approach to runway 22L in newark; during radar vectoring under the control of new york approach; we experienced a TCAS/RA while in level flight at 5000 feet MSL. I was the pilot flying at the time; so I immediately disconnected the autopilot; and began a climbing escape maneuver to 5300 feet MSL; before descending back to 5000 feet MSL; after the intruder aircraft has passed 300 feet below our left wing. My first officer advised ATC; and we continued without any further incident to a safe landing at newark airport.

Original NASA ASRS Text

Title: B737 flight crew reported responding to a TCAS Resolution Advisory due to near mid air collision.

Narrative: On approach to runway 22L in Newark; during radar vectoring under the control of New York Approach; we experienced a TCAS/RA while in level flight at 5000 feet MSL. I was the pilot flying at the time; so I immediately disconnected the autopilot; and began a climbing escape maneuver to 5300 feet MSL; before descending back to 5000 feet MSL; after the intruder aircraft has passed 300 feet below our left wing. My First Officer advised ATC; and we continued without any further incident to a safe landing at Newark Airport.

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.