Air carrier X had near midair collision with small transport Y. See and avoid concept.

Attributes
ACN	147134
Time
Date	199006
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ccr
State Reference	CA
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : suu
Operator	common carrier : air carrier
Make Model Name	Light Transport
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent other
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 : 3300 flight time type : 550
ASRS Report	147134
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While en route from sfo-smf, air carrier X was on course nwbnd on the concord (VOR) 353 degree right approximately 30 DME. We were assigned 5000' and given a vector heading 020 degrees left of our present heading by travis approach on 132.1. This change put us on a heading of 335 degree. Travis issued this heading change due to numerous traffic in our vicinity. Travis approach had not however specifically pointed out any targets to us. We saw small transport Y at our 1 to 2 O'clock position approximately 200' to 300' above our altitude descending toward us. Small transport Y was in our blind spot until the last min. To avoid small transport Y the first officer (flying at the time) immediately turned left and descended approximately 500' to 700'. We then questioned the approach controller and he stated that there were too many targets to specifically point out or single out every one.

Original NASA ASRS Text

Title: ACR X HAD NMAC WITH SMT Y. SEE AND AVOID CONCEPT.

Narrative: WHILE ENRTE FROM SFO-SMF, ACR X WAS ON COURSE NWBND ON THE CONCORD (VOR) 353 DEG R APPROX 30 DME. WE WERE ASSIGNED 5000' AND GIVEN A VECTOR HDG 020 DEGS L OF OUR PRESENT HDG BY TRAVIS APCH ON 132.1. THIS CHANGE PUT US ON A HDG OF 335 DEG. TRAVIS ISSUED THIS HDG CHANGE DUE TO NUMEROUS TFC IN OUR VICINITY. TRAVIS APCH HAD NOT HOWEVER SPECIFICALLY POINTED OUT ANY TARGETS TO US. WE SAW SMT Y AT OUR 1 TO 2 O'CLOCK POS APPROX 200' TO 300' ABOVE OUR ALT DSNDING TOWARD US. SMT Y WAS IN OUR BLIND SPOT UNTIL THE LAST MIN. TO AVOID SMT Y THE F/O (FLYING AT THE TIME) IMMEDIATELY TURNED L AND DSNDED APPROX 500' TO 700'. WE THEN QUESTIONED THE APCH CTLR AND HE STATED THAT THERE WERE TOO MANY TARGETS TO SPECIFICALLY POINT OUT OR SINGLE OUT EVERY ONE.

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.