A BE33 pilot at 6000 ft over pomona took evasive action upon sighting an air carrier at his altitude...

Attributes
ACN	563877
Time
Date	200210
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : pom.airport
State Reference	CA
Altitude	msl bound lower : 6000 msl bound upper : 6500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon tower : cma.tower
Operator	general aviation : personal
Make Model Name	Bonanza 33
Operating Under FAR Part	Part 91
Flight Phase	descent : vacating altitude
Flight Plan	None
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 20 flight time total : 3500 flight time type : 1200
ASRS Report	563877
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 3000 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure
Primary Problem	Flight Crew Human Performance

Narrative:

E33A bonanza wbound near pomona, ca, VFR at 6500 ft, began a descent toward vny. About 1 min before reaching 6000 ft, at that time, the bonanza and 2 passenger noted an air carrier aircraft sbound at 2 O'clock position at same altitude. The bonanza made an immediate 45 degree and turn to the right to avoid closer proximity. The air carrier also appeared to make a moderate bank to the right (corrective action). The closest the 2 aircraft came was 1500-3000 ft (estimate of pilot of E33 bonanza) horizontally. Air was clear and smooth. The pilot and passenger aboard the E33 bonanza were alert and looking for traffic. The visibility was 7-10 mi. Socal approach noted the incident on radar and reported it to cma airport tower where ground notified the bonanza to call socal approach by phone. This was done by the pilot. He explained the incident to the socal approach supervisor. There were no other contributing factors. The supervisor was satisfied when told the bonanza was at 6000 ft because of the descent. Prevention of future occurrence: VFR flight following may have had some effect.

Original NASA ASRS Text

Title: A BE33 PLT AT 6000 FT OVER POMONA TOOK EVASIVE ACTION UPON SIGHTING AN ACR AT HIS ALT.

Narrative: E33A BONANZA WBOUND NEAR POMONA, CA, VFR AT 6500 FT, BEGAN A DSCNT TOWARD VNY. ABOUT 1 MIN BEFORE REACHING 6000 FT, AT THAT TIME, THE BONANZA AND 2 PAX NOTED AN ACR ACFT SBOUND AT 2 O'CLOCK POS AT SAME ALT. THE BONANZA MADE AN IMMEDIATE 45 DEG AND TURN TO THE R TO AVOID CLOSER PROX. THE ACR ALSO APPEARED TO MAKE A MODERATE BANK TO THE R (CORRECTIVE ACTION). THE CLOSEST THE 2 ACFT CAME WAS 1500-3000 FT (ESTIMATE OF PLT OF E33 BONANZA) HORIZLY. AIR WAS CLR AND SMOOTH. THE PLT AND PAX ABOARD THE E33 BONANZA WERE ALERT AND LOOKING FOR TFC. THE VISIBILITY WAS 7-10 MI. SOCAL APCH NOTED THE INCIDENT ON RADAR AND RPTED IT TO CMA ARPT TWR WHERE GND NOTIFIED THE BONANZA TO CALL SOCAL APCH BY PHONE. THIS WAS DONE BY THE PLT. HE EXPLAINED THE INCIDENT TO THE SOCAL APCH SUPVR. THERE WERE NO OTHER CONTRIBUTING FACTORS. THE SUPVR WAS SATISFIED WHEN TOLD THE BONANZA WAS AT 6000 FT BECAUSE OF THE DSCNT. PREVENTION OF FUTURE OCCURRENCE: VFR FLT FOLLOWING MAY HAVE HAD SOME EFFECT.

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.