Near midair collision between opposite direction traffic.

Attributes
ACN	200536
Time
Date	199201
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sna
State Reference	CA
Altitude	msl bound lower : 5000 msl bound upper : 5200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sna
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Transport
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 13000 flight time type : 2500
ASRS Report	200536
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

On descent from 7000 ft to 4000 ft for ILS runway 19L controller instructed us to expedite descent through 5000 ft. Expedited but then got TCASII RA 'climb' about 5200 ft. Climbed briefly and 2 aircraft in formation went under us about 200 ft below. One was an old MTR small transport, other not idented as to type. Understand these were VFR aircraft not communicating with coast approach. A TCA is needed at sna!!

Original NASA ASRS Text

Title: NMAC BTWN OPPOSITE DIRECTION TFC.

Narrative: ON DSCNT FROM 7000 FT TO 4000 FT FOR ILS RWY 19L CTLR INSTRUCTED US TO EXPEDITE DSCNT THROUGH 5000 FT. EXPEDITED BUT THEN GOT TCASII RA 'CLB' ABOUT 5200 FT. CLBED BRIEFLY AND 2 ACFT IN FORMATION WENT UNDER US ABOUT 200 FT BELOW. ONE WAS AN OLD MTR SMT, OTHER NOT IDENTED AS TO TYPE. UNDERSTAND THESE WERE VFR ACFT NOT COMMUNICATING WITH COAST APCH. A TCA IS NEEDED AT SNA!!

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.