Large transport on climb has near midair collision with commuter aircraft on descent.

Attributes
ACN	221450
Time
Date	199209
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 11500 msl bound upper : 11500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 21000 flight time type : 13000
ASRS Report	221450
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 9000 flight time type : 7000
ASRS Report	221275
Events
Anomaly	conflict : airborne less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 500 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While climbing out of lga on the above stated radial we were notified of traffic at 11 O'clock, 15 mi, descending from 14500 ft. We replied 'negative contact' and continued to look for the traffic. The controller was busy with other aircraft on the frequency. At 11500 we observed a twin at our 9 O'clock position, at our altitude, in a hard right bank. He questioned the controller about it and he said it was a twin commuter aircraft -- that was all he said. We took no evasive action as it was obvious the aircraft would miss us. This could have been avoided if the controller could have kept us informed if he had time, but the density does not allow for this.

Original NASA ASRS Text

Title: LGT ON CLB HAS NMAC WITH COMMUTER ACFT ON DSCNT.

Narrative: WHILE CLBING OUT OF LGA ON THE ABOVE STATED RADIAL WE WERE NOTIFIED OF TFC AT 11 O'CLOCK, 15 MI, DSNDING FROM 14500 FT. WE REPLIED 'NEGATIVE CONTACT' AND CONTINUED TO LOOK FOR THE TFC. THE CTLR WAS BUSY WITH OTHER ACFT ON THE FREQ. AT 11500 WE OBSERVED A TWIN AT OUR 9 O'CLOCK POS, AT OUR ALT, IN A HARD R BANK. HE QUESTIONED THE CTLR ABOUT IT AND HE SAID IT WAS A TWIN COMMUTER ACFT -- THAT WAS ALL HE SAID. WE TOOK NO EVASIVE ACTION AS IT WAS OBVIOUS THE ACFT WOULD MISS US. THIS COULD HAVE BEEN AVOIDED IF THE CTLR COULD HAVE KEPT US INFORMED IF HE HAD TIME, BUT THE DENSITY DOES NOT ALLOW FOR THIS.

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.