Small transport X had near midair collision with small aircraft Y. See and avoid concept.

Attributes
ACN	184204
Time
Date	199107
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ccr
State Reference	CA
Altitude	msl bound lower : 1500 msl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ccr
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	other
Flight Plan	None
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Retractable Gear
Flight Phase	climbout : initial climbout : takeoff
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 2350 flight time type : 500
ASRS Report	184204
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
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 100 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Operational Error

Narrative:

Small aircraft X reported 8 mi north over suison bay to concord tower and was told to enter right downwind for runway 32R. Tower departed small aircraft Y on runway 32R with a downwind departure and advised 'him' I was inbound from the north as he was rolling down the runway. He acknowledged. As I turned downwind small aircraft Y climbed below me and appeared at my 10:30 at 200 ft away. I was never advised of this traffic and he advised only once of me. The tower controller seemed to have a cold and was very defensive when we (small aircraft Y pilot and myself) considered controller in error.

Original NASA ASRS Text

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

Narrative: SMA X RPTED 8 MI N OVER SUISON BAY TO CONCORD TWR AND WAS TOLD TO ENTER R DOWNWIND FOR RWY 32R. TWR DEPARTED SMA Y ON RWY 32R WITH A DOWNWIND DEP AND ADVISED 'HIM' I WAS INBOUND FROM THE N AS HE WAS ROLLING DOWN THE RWY. HE ACKNOWLEDGED. AS I TURNED DOWNWIND SMA Y CLBED BELOW ME AND APPEARED AT MY 10:30 AT 200 FT AWAY. I WAS NEVER ADVISED OF THIS TFC AND HE ADVISED ONLY ONCE OF ME. THE TWR CTLR SEEMED TO HAVE A COLD AND WAS VERY DEFENSIVE WHEN WE (SMA Y PLT AND MYSELF) CONSIDERED CTLR IN ERROR.

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.