TCASII RA inside the OM in the lga class B airspace.

Attributes
ACN	535014
Time
Date	200201
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : lga.airport
State Reference	NY
Environment
Flight Conditions	Marginal
Weather Elements	Snow
Light	Night
Aircraft 1
Controlling Facilities	tower : lga.tower
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 04
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 8000 flight time type : 1500
ASRS Report	535014
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Aircraft Airspace Structure ATC Human Performance
Primary Problem	Ambiguous

Narrative:

TCASII RA 'descend, crossing' while inbound on ILS runway 4, inside OM, on GS. Complied with RA causing deviation below GS and aural 'GS' warning. Advised lga tower of action. Corrected back to GS when clear of conflict. No traffic noted visually. Amber target appeared briefly on navigation display. Tower noted no traffic in vicinity.

Original NASA ASRS Text

Title: TCASII RA INSIDE THE OM IN THE LGA CLASS B AIRSPACE.

Narrative: TCASII RA 'DSND, XING' WHILE INBOUND ON ILS RWY 4, INSIDE OM, ON GS. COMPLIED WITH RA CAUSING DEV BELOW GS AND AURAL 'GS' WARNING. ADVISED LGA TWR OF ACTION. CORRECTED BACK TO GS WHEN CLR OF CONFLICT. NO TFC NOTED VISUALLY. AMBER TARGET APPEARED BRIEFLY ON NAV DISPLAY. TWR NOTED NO TFC IN VICINITY.

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.