B777-200 crew and a light aircraft had a TCASII RA while on final to runway 31R at jfk.

Attributes
ACN	556451
Time
Date	200208
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : jfk.airport
State Reference	NY
Altitude	msl single value : 2000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon tower : jfk.tower
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 31r other
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : jfk.tower
Make Model Name	Small Aircraft
Flight Phase	descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	556451
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact other
Consequence	other
Miss Distance	vertical : 300
Supplementary
Problem Areas	ATC Human Performance FAA
Primary Problem	ATC Human Performance
Air Traffic Incident	other
Situations
ATC Facility	procedure or policy : n90.tracon

Narrative:

TCASII alert on final approach jfk ILS runway 31R. I was the PF on ILS runway 31R localizer at 2000 ft MSL. Prior to GS intercept, we were advised by approach control that there would be light aircraft traffic passing from right to left at 2500 ft MSL. We first saw the traffic on TCASII and then acquired the single engine visually. TCASII had his altitude at 2300 ft MSL. As we closed in on the traffic, TCASII commanded 'monitor vertical speed.' a red trapezoid from the top of the primary flight display was also presented. No action was taken by the PF. The flight ended uneventfully with a full stop landing. Had we not been able to acquire the traffic visually, there would have been great concern for potential disaster. Jfk may want to rethink having traffic flying so near final approach.

Original NASA ASRS Text

Title: B777-200 CREW AND A LIGHT ACFT HAD A TCASII RA WHILE ON FINAL TO RWY 31R AT JFK.

Narrative: TCASII ALERT ON FINAL APCH JFK ILS RWY 31R. I WAS THE PF ON ILS RWY 31R LOC AT 2000 FT MSL. PRIOR TO GS INTERCEPT, WE WERE ADVISED BY APCH CTL THAT THERE WOULD BE LIGHT ACFT TFC PASSING FROM R TO L AT 2500 FT MSL. WE FIRST SAW THE TFC ON TCASII AND THEN ACQUIRED THE SINGLE ENG VISUALLY. TCASII HAD HIS ALT AT 2300 FT MSL. AS WE CLOSED IN ON THE TFC, TCASII COMMANDED 'MONITOR VERT SPD.' A RED TRAPEZOID FROM THE TOP OF THE PRIMARY FLT DISPLAY WAS ALSO PRESENTED. NO ACTION WAS TAKEN BY THE PF. THE FLT ENDED UNEVENTFULLY WITH A FULL STOP LNDG. HAD WE NOT BEEN ABLE TO ACQUIRE THE TFC VISUALLY, THERE WOULD HAVE BEEN GREAT CONCERN FOR POTENTIAL DISASTER. JFK MAY WANT TO RETHINK HAVING TFC FLYING SO NEAR FINAL APCH.

Data retrieved from NASA's ASRS site as of July 2007 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.