Large transport on climbout has near midair collision with small aircraft.

Attributes
ACN	174942
Time
Date	199104
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 7500 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors enroute airway : n90
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : atp
Experience	flight time last 90 days : 166 flight time total : 10450 flight time type : 6500
ASRS Report	174947
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 200 vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

We were climbing to 10000', through 7500' (250 KTS), heading 340 degrees to intercept the lga 322 degree right to neon intersection. The first officer was flying the aircraft by hand. We had just been given an ATC frequency change and I had looked down to change it. As I looked up, both the first officer and I simultaneously saw a blue and white small aircraft at approximately 11:30, slightly high, at about 300-400'. We both initiated a gentle pushover to maintain altitude sep. The other aircraft had evidently seen us, as he was in about a 30 degree right evasive turn. I called ATC to report, and they said that the other aircraft had no transponder return. We did not have TCAS installed. No passenger were injured and none of them noticed the encounter, as the pushover was a smooth one. I later phoned ATC and reported the incident to mr. Y (ATC). I also filled out a report for the company and the FAA. ATC was unable to track the other aircraft. Our aircraft continued to dtw and landed operations normal.

Original NASA ASRS Text

Title: LGT ON CLIMBOUT HAS NMAC WITH SMA.

Narrative: WE WERE CLBING TO 10000', THROUGH 7500' (250 KTS), HDG 340 DEGS TO INTERCEPT THE LGA 322 DEG R TO NEON INTXN. THE F/O WAS FLYING THE ACFT BY HAND. WE HAD JUST BEEN GIVEN AN ATC FREQ CHANGE AND I HAD LOOKED DOWN TO CHANGE IT. AS I LOOKED UP, BOTH THE F/O AND I SIMULTANEOUSLY SAW A BLUE AND WHITE SMA AT APPROX 11:30, SLIGHTLY HIGH, AT ABOUT 300-400'. WE BOTH INITIATED A GENTLE PUSHOVER TO MAINTAIN ALT SEP. THE OTHER ACFT HAD EVIDENTLY SEEN US, AS HE WAS IN ABOUT A 30 DEG RIGHT EVASIVE TURN. I CALLED ATC TO RPT, AND THEY SAID THAT THE OTHER ACFT HAD NO XPONDER RETURN. WE DID NOT HAVE TCAS INSTALLED. NO PAX WERE INJURED AND NONE OF THEM NOTICED THE ENCOUNTER, AS THE PUSHOVER WAS A SMOOTH ONE. I LATER PHONED ATC AND RPTED THE INCIDENT TO MR. Y (ATC). I ALSO FILLED OUT A RPT FOR THE COMPANY AND THE FAA. ATC WAS UNABLE TO TRACK THE OTHER ACFT. OUR ACFT CONTINUED TO DTW AND LANDED OPS NORMAL.

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.