MD80 has near midair collision with a mooney 231 in san class B airspace.

Attributes
ACN	343076
Time
Date	199608
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : san
State Reference	CA
Altitude	msl bound lower : 7000 msl bound upper : 7400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : san
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	M-20 K (231)
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	343076
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 400
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Location: approximately 25 mi east of san at 7400 ft MSL traffic reported by approach, displayed of TCASII with no altitude, approach not talking to reported traffic, traffic was finally spotted estimated at 7000 ft or above MSL. At the time we were at 7400 ft MSL in descent. Traffic started a turn away when he apparently saw us and we estimate we were less than 500 ft separation laterally at closest point of approach. First officer read 231 vertically on the tail. Aircraft was white with brown and orange trim. Aircraft type recognized by first officer as a mooney 231. Phone call to ATC reconfirmed that no communications were established with traffic, that traffic apparently had mode C turned off, that the incident occurred in san class B area. Attempts to track the aircraft were unsuccessful. Aircraft disappeared at low altitude after it crossed the border into mexico.

Original NASA ASRS Text

Title: MD80 HAS NMAC WITH A MOONEY 231 IN SAN CLASS B AIRSPACE.

Narrative: LOCATION: APPROX 25 MI E OF SAN AT 7400 FT MSL TFC RPTED BY APCH, DISPLAYED OF TCASII WITH NO ALT, APCH NOT TALKING TO RPTED TFC, TFC WAS FINALLY SPOTTED ESTIMATED AT 7000 FT OR ABOVE MSL. AT THE TIME WE WERE AT 7400 FT MSL IN DSCNT. TFC STARTED A TURN AWAY WHEN HE APPARENTLY SAW US AND WE ESTIMATE WE WERE LESS THAN 500 FT SEPARATION LATERALLY AT CLOSEST POINT OF APCH. FO READ 231 VERTLY ON THE TAIL. ACFT WAS WHITE WITH BROWN AND ORANGE TRIM. ACFT TYPE RECOGNIZED BY FO AS A MOONEY 231. PHONE CALL TO ATC RECONFIRMED THAT NO COMS WERE ESTABLISHED WITH TFC, THAT TFC APPARENTLY HAD MODE C TURNED OFF, THAT THE INCIDENT OCCURRED IN SAN CLASS B AREA. ATTEMPTS TO TRACK THE ACFT WERE UNSUCCESSFUL. ACFT DISAPPEARED AT LOW ALT AFTER IT CROSSED THE BORDER INTO MEXICO.

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.