<< >> NASA ASRS Report 158473, September 1990

Departure controller called traffic for large transport and requested an expedited climb, but separation was lost anyway.

Attributes
ACN	158473
Time
Date	199009
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sbj airport : lga
State Reference	NJ
Altitude	msl bound lower : 10000 msl bound upper : 10500
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : azo
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : n90
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : instrument
Experience	flight time last 90 days : 240 flight time total : 21000 flight time type : 10000
ASRS Report	158473
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

On departure from lga, during climb out to 15000', assigned heading 290 degrees, ATC advised of aircraft opp direction at our 11:30 position, 10000', and requested an expedite climb. We were VFR conditions, and visually acquired the aircraft (a foreign large transport Y) at less than 3 mi (estimated), and at our altitude. His position was not changing on the windscreen, but was getting larger, so I turned 30 degrees left to about 260 degrees, and the aircraft passed slightly below us (we were passing 10500' and slightly right, estimated 1/4 NM). Because we acquired the aircraft visually, and in time to maneuver away from his aircraft, we were able to avoid a much closer passing. Note: the controller had made several radio calls to the large transport Y aircraft west/O response before finally answering. While this was a close encounter, I choose not to think how close it might have been, had we been IFR and unable to fly an escape course.

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Original NASA ASRS Text

Title: DEP CTLR CALLED TRAFFIC FOR LGT AND REQUESTED AN EXPEDITED CLIMB, BUT SEPARATION WAS LOST ANYWAY.

Narrative: ON DEP FROM LGA, DURING CLBOUT TO 15000', ASSIGNED HDG 290 DEGS, ATC ADVISED OF ACFT OPP DIRECTION AT OUR 11:30 POS, 10000', AND REQUESTED AN EXPEDITE CLB. WE WERE VFR CONDITIONS, AND VISUALLY ACQUIRED THE ACFT (A FOREIGN LGT Y) AT LESS THAN 3 MI (ESTIMATED), AND AT OUR ALT. HIS POS WAS NOT CHANGING ON THE WINDSCREEN, BUT WAS GETTING LARGER, SO I TURNED 30 DEGS LEFT TO ABOUT 260 DEGS, AND THE ACFT PASSED SLIGHTLY BELOW US (WE WERE PASSING 10500' AND SLIGHTLY RIGHT, ESTIMATED 1/4 NM). BECAUSE WE ACQUIRED THE ACFT VISUALLY, AND IN TIME TO MANEUVER AWAY FROM HIS ACFT, WE WERE ABLE TO AVOID A MUCH CLOSER PASSING. NOTE: THE CTLR HAD MADE SEVERAL RADIO CALLS TO THE LGT Y ACFT W/O RESPONSE BEFORE FINALLY ANSWERING. WHILE THIS WAS A CLOSE ENCOUNTER, I CHOOSE NOT TO THINK HOW CLOSE IT MIGHT HAVE BEEN, HAD WE BEEN IFR AND UNABLE TO FLY AN ESCAPE COURSE.

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.