Near midair collision with small aircraft cruising as medium large transport in descent.

Attributes
ACN	92589
Time
Date	198808
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pdz airport : ont
State Reference	CA
Altitude	msl bound lower : 7500 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8000 flight time type : 2000
ASRS Report	92589
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time total : 6500 flight time type : 875
ASRS Report	92386
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While descending, first officer flying, I looked up and saw an aircraft straight ahead of us at our altitude. Called to first officer and at same time pushed over our aircraft to avoid traffic. The aircraft passed over us with approximately a 300' sep. No injuries to passenger or crew. The other aircraft was a high wing retractable gear, single engine small aircraft, heading roughly east at about 7500'. Approximately distance at first sighting was approximately 1/2 mi. We did not receive a traffic all from ATC. We were flying from psp to ont. Flight time roughly 15 mins. With the amount of traffic in the left.a. Basin plus the need for exact navigation requirements in that area and flying duties, I believe the see and be seen concept is not workable in this area.

Original NASA ASRS Text

Title: NMAC WITH SMA CRUISING AS MLG IN DESCENT.

Narrative: WHILE DSNDING, F/O FLYING, I LOOKED UP AND SAW AN ACFT STRAIGHT AHEAD OF US AT OUR ALT. CALLED TO F/O AND AT SAME TIME PUSHED OVER OUR ACFT TO AVOID TFC. THE ACFT PASSED OVER US WITH APPROX A 300' SEP. NO INJURIES TO PAX OR CREW. THE OTHER ACFT WAS A HIGH WING RETRACTABLE GEAR, SINGLE ENG SMA, HDG ROUGHLY E AT ABOUT 7500'. APPROX DISTANCE AT FIRST SIGHTING WAS APPROX 1/2 MI. WE DID NOT RECEIVE A TFC ALL FROM ATC. WE WERE FLYING FROM PSP TO ONT. FLT TIME ROUGHLY 15 MINS. WITH THE AMOUNT OF TFC IN THE L.A. BASIN PLUS THE NEED FOR EXACT NAV REQUIREMENTS IN THAT AREA AND FLYING DUTIES, I BELIEVE THE SEE AND BE SEEN CONCEPT IS NOT WORKABLE IN THIS AREA.

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.