Small aircraft pilot reported an near midair collision with a B737 in the vicinity of sna airport.

Attributes
ACN	1727323
Time
Date	202002
Local Time Of Day	1201-1800
Place
Locale Reference	SNA.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	None
Flight Plan	None
Aircraft 2
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Plan	IFR
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Instrument Flight Crew Private Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 20 Flight Crew Total 1800 Flight Crew Type 350
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 500 Vertical 500

Narrative:

I was flying in visual conditions along the shoreline south of sli VOR in a northwesterly direction while descending to land at ZZZ. I was above the sna airpsace at 5500 MSL. A B737 flew underneath me traveling in a northeasterly direction. I estimate the clearance at approx 500 ft. I saw the 737; stopped my descent and turned northerly. The airline did not take evasive action. I proceeded uneventfully to ZZZ and landed.

Original NASA ASRS Text

Title: Small aircraft pilot reported an NMAC with a B737 in the vicinity of SNA airport.

Narrative: I was flying in visual conditions along the shoreline south of SLI VOR in a northwesterly direction while descending to land at ZZZ. I was above the SNA airpsace at 5500 MSL. A B737 flew underneath me traveling in a northeasterly direction. I estimate the clearance at approx 500 ft. I saw the 737; stopped my descent and turned northerly. The airline did not take evasive action. I proceeded uneventfully to ZZZ and landed.

Data retrieved from NASA's ASRS site 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.