Medium large transport on SID has near midair collision with light transport on visual approach.

Attributes
ACN	118039
Time
Date	198907
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ont
State Reference	CA
Altitude	msl bound lower : 4000 msl bound upper : 4300
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air taxi
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 170 flight time total : 6000 flight time type : 550
ASRS Report	118039
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 250
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Medium large transport X departed 26R at ont. At 2000' MSL we entered a left turn direct to pdz VOR via the prado ii departure. While in the left turn to pdz, we heard ont departure control issue light transport Y traffic at 12 O'clock and 5 mi climbing. He answered that he had contact with the medium large transport X jet. Departure control cleared light transport Y to maintain visibility contact with medium large transport X, then for a visibility approach to the airport. While still in the left turn, we were issued traffic at 11 O'clock out of 4600', descending. My first officer reported light transport Y in sight. After a second my first officer remarked that he wondered where the traffic was going and whether or not he actually had us in sight. The first officer called back departure control and questioned that. Departure remarked that light transport Y was proceeding to the airport and had us in sight. Before I called out of the turn and before I personally could see light transport Y, my first officer pushed the nose over and we went under light transport Y approximately 200-300'. Our landing lights fully illuminated light transport Y. We would have hit him had not the first officer responded. In retrospect, maybe departure control could have issued more specific instructions to light transport Y; example: 'pass above and behind, maintain visibility.'

Original NASA ASRS Text

Title: MLG ON SID HAS NMAC WITH LTT ON VISUAL APCH.

Narrative: MLG X DEPARTED 26R AT ONT. AT 2000' MSL WE ENTERED A LEFT TURN DIRECT TO PDZ VOR VIA THE PRADO II DEP. WHILE IN THE LEFT TURN TO PDZ, WE HEARD ONT DEP CTL ISSUE LTT Y TFC AT 12 O'CLOCK AND 5 MI CLBING. HE ANSWERED THAT HE HAD CONTACT WITH THE MLG X JET. DEP CTL CLRED LTT Y TO MAINTAIN VIS CONTACT WITH MLG X, THEN FOR A VIS APCH TO THE ARPT. WHILE STILL IN THE LEFT TURN, WE WERE ISSUED TFC AT 11 O'CLOCK OUT OF 4600', DSNDING. MY F/O RPTED LTT Y IN SIGHT. AFTER A SECOND MY F/O REMARKED THAT HE WONDERED WHERE THE TFC WAS GOING AND WHETHER OR NOT HE ACTUALLY HAD US IN SIGHT. THE F/O CALLED BACK DEP CTL AND QUESTIONED THAT. DEP REMARKED THAT LTT Y WAS PROCEEDING TO THE ARPT AND HAD US IN SIGHT. BEFORE I CALLED OUT OF THE TURN AND BEFORE I PERSONALLY COULD SEE LTT Y, MY F/O PUSHED THE NOSE OVER AND WE WENT UNDER LTT Y APPROX 200-300'. OUR LNDG LIGHTS FULLY ILLUMINATED LTT Y. WE WOULD HAVE HIT HIM HAD NOT THE F/O RESPONDED. IN RETROSPECT, MAYBE DEP CTL COULD HAVE ISSUED MORE SPECIFIC INSTRUCTIONS TO LTT Y; EXAMPLE: 'PASS ABOVE AND BEHIND, MAINTAIN VIS.'

Data retrieved from NASA's ASRS site as of August 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.