Conflict airborne less severe (operational error).

Attributes
ACN	294815
Time
Date	199501
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ewr
State Reference	NJ
Altitude	msl bound lower : 4000 msl bound upper : 6000
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	294915
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	294974
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 600
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

At approximately XA30 local, while being vectored for ILS runway 4R at ewr, we were assigned an altitude of 6000 ft heading 200 degrees. Shortly after rolling out on a 200 degree heading, TCASII indicated a TA. Almost immediately ATC gave a descent to 4000 ft and turn to 130 degrees. During readback TCASII RA commanded a descent of about 2000 FPM. We complied with the TCASII then returned to the ATC clearance. We observed a minimum clearance of approximately 600 ft vertical and 1 mi horizontal. Prior to the TA, no other instructions were heard or acknowledged by us in relation to this situation.

Original NASA ASRS Text

Title: CONFLICT AIRBORNE LESS SEVERE (OPERROR).

Narrative: AT APPROX XA30 LCL, WHILE BEING VECTORED FOR ILS RWY 4R AT EWR, WE WERE ASSIGNED AN ALT OF 6000 FT HDG 200 DEGS. SHORTLY AFTER ROLLING OUT ON A 200 DEG HDG, TCASII INDICATED A TA. ALMOST IMMEDIATELY ATC GAVE A DSCNT TO 4000 FT AND TURN TO 130 DEGS. DURING READBACK TCASII RA COMMANDED A DSCNT OF ABOUT 2000 FPM. WE COMPLIED WITH THE TCASII THEN RETURNED TO THE ATC CLRNC. WE OBSERVED A MINIMUM CLRNC OF APPROX 600 FT VERT AND 1 MI HORIZ. PRIOR TO THE TA, NO OTHER INSTRUCTIONS WERE HEARD OR ACKNOWLEDGED BY US IN RELATION TO THIS SIT.

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.