Near midair collision.

Attributes
ACN	267512
Time
Date	199403
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pdx airport : ont
State Reference	CA
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Jetstream 32
Operating Under FAR Part	Part 135
Flight Phase	cruise other descent other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : cfi
Experience	flight time last 90 days : 225 flight time total : 4700 flight time type : 225
ASRS Report	267512
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 250
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Scheduled regional airline flight from lax-ont. Cruise flight was 7000 ft MSL. We were IMC at 7000 ft when ont approach cleared us to 5000 ft MSL. We broke out of the overcast at 5200 ft MSL and leveled at 5000 ft. We were inside class C airspace which is up to and includes 5000 ft MSL when a light cessna was spotted on a collision course with us (opposite direction). We both made an evasive turn to the right. The cessna, who was in the class C airspace for ont and not in radio communication, was lost on radar over corona. The traffic was never pointed out to us, although he was on ont radar, since they were busy. In my opinion, ATC should be required to give us TA's of known potential traffic conflicts. TCASII, which will be installed in our aircraft shortly, might have helped.

Original NASA ASRS Text

Title: NMAC.

Narrative: SCHEDULED REGIONAL AIRLINE FLT FROM LAX-ONT. CRUISE FLT WAS 7000 FT MSL. WE WERE IMC AT 7000 FT WHEN ONT APCH CLRED US TO 5000 FT MSL. WE BROKE OUT OF THE OVCST AT 5200 FT MSL AND LEVELED AT 5000 FT. WE WERE INSIDE CLASS C AIRSPACE WHICH IS UP TO AND INCLUDES 5000 FT MSL WHEN A LIGHT CESSNA WAS SPOTTED ON A COLLISION COURSE WITH US (OPPOSITE DIRECTION). WE BOTH MADE AN EVASIVE TURN TO THE R. THE CESSNA, WHO WAS IN THE CLASS C AIRSPACE FOR ONT AND NOT IN RADIO COM, WAS LOST ON RADAR OVER CORONA. THE TFC WAS NEVER POINTED OUT TO US, ALTHOUGH HE WAS ON ONT RADAR, SINCE THEY WERE BUSY. IN MY OPINION, ATC SHOULD BE REQUIRED TO GIVE US TA'S OF KNOWN POTENTIAL TFC CONFLICTS. TCASII, WHICH WILL BE INSTALLED IN OUR ACFT SHORTLY, MIGHT HAVE HELPED.

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.