Near midair collision between cpr medium large transport and small aircraft at sts.

Attributes
ACN	151500
Time
Date	199007
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sts
State Reference	CA
Altitude	agl bound lower : 1000 agl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sts
Operator	general aviation : corporate
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	descent : approach
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 14000 flight time type : 7000
ASRS Report	151500
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : required legal separation other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 150 vertical : 75
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were in the sts area for approximately 30 mins total time. During that time we heard, prior to our problem, another near miss between a light aircraft and a tanker aircraft. Then our problem and then when we were waiting to takeoff, we saw a near miss between a cpr mdt and a twin small transport. After the 3RD near miss there was a controller change. Our problem occurred after we had been cleared to land on a visibility approach to runway 14. I noticed out the right windshield a single engine small aircraft Y converging on our course. We were on the VASI and lined up on the centerline for runway 14. I made an immediate left turn of approximately 21 degree to avoid collision. We asked the tower what they would like us to do. They recommended a left 360, which we did and proceeded to land normally after the small aircraft Y.

Original NASA ASRS Text

Title: NMAC BETWEEN CPR MLG AND SMA AT STS.

Narrative: WE WERE IN THE STS AREA FOR APPROX 30 MINS TOTAL TIME. DURING THAT TIME WE HEARD, PRIOR TO OUR PROB, ANOTHER NEAR MISS BTWN A LIGHT ACFT AND A TANKER ACFT. THEN OUR PROB AND THEN WHEN WE WERE WAITING TO TKOF, WE SAW A NEAR MISS BTWN A CPR MDT AND A TWIN SMT. AFTER THE 3RD NEAR MISS THERE WAS A CTLR CHANGE. OUR PROB OCCURRED AFTER WE HAD BEEN CLRED TO LAND ON A VIS APCH TO RWY 14. I NOTICED OUT THE R WINDSHIELD A SINGLE ENG SMA Y CONVERGING ON OUR COURSE. WE WERE ON THE VASI AND LINED UP ON THE CTRLINE FOR RWY 14. I MADE AN IMMEDIATE L TURN OF APPROX 21 DEG TO AVOID COLLISION. WE ASKED THE TWR WHAT THEY WOULD LIKE US TO DO. THEY RECOMMENDED A L 360, WHICH WE DID AND PROCEEDED TO LAND NORMALLY AFTER THE SMA Y.

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.