Medium large transport has near midair collision with small transport. TCASII alert.

Attributes
ACN	265057
Time
Date	199402
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cae
State Reference	SC
Altitude	msl bound lower : 9500 msl bound upper : 9500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute airway : cae
Flight Plan	IFR
Aircraft 2
Make Model Name	Beechcraft Twin Piston Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 7700 flight time type : 2000
ASRS Report	265057
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe conflict : nmac other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 0
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Descent into cae, passing 9500 ft MSL, a light twin (beech baron) was observed by captain at 10 O'clock approximately 2 mi. As he maneuvered to the right and slightly down, approach control informed us of possible traffic at 10 O'clock passing behind. TCASII was operational, the only information ever received was 'traffic, traffic' one time. No resolution was given. Traffic then disappeared from TCASII and had not been on TCASII prior to this call. Traffic was 10 O'clock, approximately 1 1/2 mi on TCASII. Captain maneuvered clear of conflict, light twin also maneuvered into a right turn to evade. Upon questioning, approach control said traffic in question had been intermittent. Due to TCASII information we believe that light twin had an intermittent transponder.

Original NASA ASRS Text

Title: MLG HAS NMAC WITH SMT. TCASII ALERT.

Narrative: DSCNT INTO CAE, PASSING 9500 FT MSL, A LIGHT TWIN (BEECH BARON) WAS OBSERVED BY CAPT AT 10 O'CLOCK APPROX 2 MI. AS HE MANEUVERED TO THE R AND SLIGHTLY DOWN, APCH CTL INFORMED US OF POSSIBLE TFC AT 10 O'CLOCK PASSING BEHIND. TCASII WAS OPERATIONAL, THE ONLY INFO EVER RECEIVED WAS 'TFC, TFC' ONE TIME. NO RESOLUTION WAS GIVEN. TFC THEN DISAPPEARED FROM TCASII AND HAD NOT BEEN ON TCASII PRIOR TO THIS CALL. TFC WAS 10 O'CLOCK, APPROX 1 1/2 MI ON TCASII. CAPT MANEUVERED CLR OF CONFLICT, LIGHT TWIN ALSO MANEUVERED INTO A R TURN TO EVADE. UPON QUESTIONING, APCH CTL SAID TFC IN QUESTION HAD BEEN INTERMITTENT. DUE TO TCASII INFO WE BELIEVE THAT LIGHT TWIN HAD AN INTERMITTENT XPONDER.

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.