An air carrier crew on final to jfk runway 31R reported another air carrier over shot runway 31L fin...

Attributes
ACN	1290825
Time
Date	201508
Local Time Of Day	0601-1200
Place
Locale Reference	JFK.Airport
State Reference	NY
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Make Model Name	Medium Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Landing
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 145 Flight Crew Total 12766 Flight Crew Type 9456
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 188 Flight Crew Total 12714 Flight Crew Type 9520
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Narrative:

We were on final outside of zulab on centerline of runway 31R and cleared for approach to the runway. We were originally cleared for ILS 31R and later cleared for visual to 31R with no traffic pointed out by ATC. Outside of zulab I saw an aircraft to our left on TCAS at 2000 feet while we were at 3000 feet. We had been given a speed assignment till 5 DME. I shortly acquired that aircraft. It was below us wandering into our final approach path. I asked the first officer to ask ATC what their intentions were for that aircraft; still in front and below us. ATC didn't immediately answer but when they did they said they were not talking to that aircraft. Absent any direction by ATC I decided to maintain 3000 feet and slow back to final approach speed to give ATC time to sort out the issue. The aircraft that had wandered into our final continued to turn left and moved out of our approach path and flew toward the 31L final path. Having slowed and configured for landing I waited till the aircraft was visually out of the 31R approach path and then descended to the runway and landed normally. Our safest course of action was to stay in a position that gave us a view of the wandering aircraft. If we had executed a go around we would have lost sight of the aircraft and not been able to react to any of their movements; up; down; left or right. And absent any directions from ATC we choose the safest course of action.

Original NASA ASRS Text

Title: An air carrier crew on final to JFK Runway 31R reported another air carrier over shot Runway 31L final and flew 1;000 feet beneath them on final. ATC was not talking to that aircraft nor relaying traffic information.

Narrative: We were on final outside of ZULAB on centerline of runway 31R and cleared for approach to the runway. We were originally cleared for ILS 31R and later cleared for visual to 31R with no traffic pointed out by ATC. Outside of ZULAB I saw an aircraft to our left on TCAS at 2000 feet while we were at 3000 feet. We had been given a speed assignment till 5 DME. I shortly acquired that aircraft. It was below us wandering into our final approach path. I asked the first officer to ask ATC what their intentions were for that aircraft; still in front and below us. ATC didn't immediately answer but when they did they said they were not talking to that aircraft. Absent any direction by ATC I decided to maintain 3000 feet and slow back to final approach speed to give ATC time to sort out the issue. The aircraft that had wandered into our final continued to turn left and moved out of our approach path and flew toward the 31L final path. Having slowed and configured for landing I waited till the aircraft was visually out of the 31R approach path and then descended to the runway and landed normally. Our safest course of action was to stay in a position that gave us a view of the wandering aircraft. If we had executed a go around we would have lost sight of the aircraft and not been able to react to any of their movements; up; down; left or right. And absent any directions from ATC we choose the safest course of action.

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.

An air carrier crew on final to jfk runway 31R reported another air carrier over shot runway 31L final and flew 1;000 feet beneath them on final. ATC was not talking to that aircraft nor relaying traffic information.