<< >> NASA ASRS Report 439751, June 1999

A B757 flight is turned and descended towards an opposite direction B777. TCASII alerts the B757 crew to the traffic near teb, nj.

Attributes
ACN	439751
Time
Date	199906
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : teb.vor
State Reference	NJ
Altitude	msl single value : 4800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon tower : lga.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne critical non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 800
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

ATC facility: N90. Location: 20 mi northwest teb VOR. Received clearance to turn left and descend from 5000 ft to 4000 ft. At 4800 ft, noticed an aircraft on TCASII at 4000 ft heading our direction. Leveled at 4800 ft. Within moments, TCASII issued an alert on the aircraft. The aircraft was a B777, level at 4000 ft. We visually avoided the B777 and reconfirmed with ATC that we were in fact cleared to 4000 ft and the turn as well. ATC confirmed the clearance. Essentially we were turned head-on to the B777. The B777 later questioned ATC about us but we could not understand his communication. If possible, please advise the B777 captain of this event. We believe his flight number was XXX.

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Original NASA ASRS Text

Title: A B757 FLT IS TURNED AND DSNDED TOWARDS AN OPPOSITE DIRECTION B777. TCASII ALERTS THE B757 CREW TO THE TFC NEAR TEB, NJ.

Narrative: ATC FACILITY: N90. LOCATION: 20 MI NW TEB VOR. RECEIVED CLRNC TO TURN L AND DSND FROM 5000 FT TO 4000 FT. AT 4800 FT, NOTICED AN ACFT ON TCASII AT 4000 FT HDG OUR DIRECTION. LEVELED AT 4800 FT. WITHIN MOMENTS, TCASII ISSUED AN ALERT ON THE ACFT. THE ACFT WAS A B777, LEVEL AT 4000 FT. WE VISUALLY AVOIDED THE B777 AND RECONFIRMED WITH ATC THAT WE WERE IN FACT CLRED TO 4000 FT AND THE TURN AS WELL. ATC CONFIRMED THE CLRNC. ESSENTIALLY WE WERE TURNED HEAD-ON TO THE B777. THE B777 LATER QUESTIONED ATC ABOUT US BUT WE COULD NOT UNDERSTAND HIS COM. IF POSSIBLE, PLEASE ADVISE THE B777 CAPT OF THIS EVENT. WE BELIEVE HIS FLT NUMBER WAS XXX.

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.