Near midair collision system error.

Attributes
ACN	253337
Time
Date	199310
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ccr
State Reference	CA
Altitude	agl bound lower : 800 agl bound upper : 800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ccr
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	descent : approach landing : go around
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach landing other other
Route In Use	approach : visual enroute : on vectors
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 2800 flight time type : 2500
ASRS Report	253337
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 150 vertical : 50
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation other
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

When 3 NM southeast of ccr, was cleared to land straight in to runway 32R. Other aircraft, a high wing small aircraft, called on right downwind for landing. He was instructed to turn base and cleared to land ahead of me. He stated he did not have me in sight. Tower assured him no conflict. Tower told us he was 1 mi ahead of us and instructed me to make s-turns. We then saw him at our 03:30 position, 50 ft above and 150 ft laterally, turning from base to final and headed straight at us. We were at this time full flaps and gear down and less than 1 mi from threshold. To avoid collision, we made immediate 360 degree left turn and cleaned airplane up, full power. We returned to land. After landing we heard other pilot tell controller he was sorry he caused a problem. Controller told him 'no problem.' we stated on tower frequency we certainly felt there was a problem. We called tower on landline after parking, but was unable to talk to lady controller. Her supervisor said it was a 'judgement call.' controller and supervisor were both flippant. I feel controller had poor depth perception, even poorer judgement and very poor attitude.

Original NASA ASRS Text

Title: NMAC SYS ERROR.

Narrative: WHEN 3 NM SE OF CCR, WAS CLRED TO LAND STRAIGHT IN TO RWY 32R. OTHER ACFT, A HIGH WING SMA, CALLED ON R DOWNWIND FOR LNDG. HE WAS INSTRUCTED TO TURN BASE AND CLRED TO LAND AHEAD OF ME. HE STATED HE DID NOT HAVE ME IN SIGHT. TWR ASSURED HIM NO CONFLICT. TWR TOLD US HE WAS 1 MI AHEAD OF US AND INSTRUCTED ME TO MAKE S-TURNS. WE THEN SAW HIM AT OUR 03:30 POS, 50 FT ABOVE AND 150 FT LATERALLY, TURNING FROM BASE TO FINAL AND HEADED STRAIGHT AT US. WE WERE AT THIS TIME FULL FLAPS AND GEAR DOWN AND LESS THAN 1 MI FROM THRESHOLD. TO AVOID COLLISION, WE MADE IMMEDIATE 360 DEG L TURN AND CLEANED AIRPLANE UP, FULL PWR. WE RETURNED TO LAND. AFTER LNDG WE HEARD OTHER PLT TELL CTLR HE WAS SORRY HE CAUSED A PROB. CTLR TOLD HIM 'NO PROB.' WE STATED ON TWR FREQ WE CERTAINLY FELT THERE WAS A PROB. WE CALLED TWR ON LANDLINE AFTER PARKING, BUT WAS UNABLE TO TALK TO LADY CTLR. HER SUPVR SAID IT WAS A 'JUDGEMENT CALL.' CTLR AND SUPVR WERE BOTH FLIPPANT. I FEEL CTLR HAD POOR DEPTH PERCEPTION, EVEN POORER JUDGEMENT AND VERY POOR ATTITUDE.

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.