Small aircraft X had near midair collision in air traffic area with small transport Y. See and avoid...

Attributes
ACN	177277
Time
Date	199104
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : oak
State Reference	CA
Altitude	msl bound lower : 1200 msl bound upper : 1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : oak
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	climbout : intermediate altitude
Route In Use	approach : visual enroute : direct
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 5 flight time total : 225
ASRS Report	177277
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : far
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
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Small aircraft X was inbound VFR to oak, reported in 5-6 mi north after being handed off from bay approach to oak tower. Oak tower confirmed contact and cleared me to a right downwind for 27R. Within approximately 1 mi north of airport, observed small transport Y headed straight for me. My speed was approximately 138 and I estimate the twin at 120 or better in climb. I took evasive action to avoid contact. At the head-on speed with time to take action, I cleared approximately 200' vertical and 100' horizontal over head of the twin. I turned to the left. I then notified the tower of the incident and they in turn (my main concern) said, 'sir, I don't even have you on radar. Confirm that you are enter right downwind for 27R.' 'tower, this is small aircraft X. I am now downwind.' he then cleared me to land with a motor glider to enter in behind me. My concern is if they cleared me for right downwind for 27R, they should have known of my approach. And if they somehow lost contact of me on radar, they should have tried to contact me. At the speed of 2 aircraft head-on, space closes fast with little time to react. I realize my responsibility as VFR to maintain aircraft sep, which I did, but the tower sounded as though they didn't even know I was in the air traffic area and was unaware of my approach. Traffic advisory from the tower would have been nice.

Original NASA ASRS Text

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

Narrative: SMA X WAS INBND VFR TO OAK, RPTED IN 5-6 MI N AFTER BEING HANDED OFF FROM BAY APCH TO OAK TWR. OAK TWR CONFIRMED CONTACT AND CLRED ME TO A RIGHT DOWNWIND FOR 27R. WITHIN APPROX 1 MI N OF ARPT, OBSERVED SMT Y HEADED STRAIGHT FOR ME. MY SPD WAS APPROX 138 AND I ESTIMATE THE TWIN AT 120 OR BETTER IN CLB. I TOOK EVASIVE ACTION TO AVOID CONTACT. AT THE HEAD-ON SPD WITH TIME TO TAKE ACTION, I CLRED APPROX 200' VERT AND 100' HORIZ OVER HEAD OF THE TWIN. I TURNED TO THE LEFT. I THEN NOTIFIED THE TWR OF THE INCIDENT AND THEY IN TURN (MY MAIN CONCERN) SAID, 'SIR, I DON'T EVEN HAVE YOU ON RADAR. CONFIRM THAT YOU ARE ENTER RIGHT DOWNWIND FOR 27R.' 'TWR, THIS IS SMA X. I AM NOW DOWNWIND.' HE THEN CLRED ME TO LAND WITH A MOTOR GLIDER TO ENTER IN BEHIND ME. MY CONCERN IS IF THEY CLRED ME FOR RIGHT DOWNWIND FOR 27R, THEY SHOULD HAVE KNOWN OF MY APCH. AND IF THEY SOMEHOW LOST CONTACT OF ME ON RADAR, THEY SHOULD HAVE TRIED TO CONTACT ME. AT THE SPD OF 2 ACFT HEAD-ON, SPACE CLOSES FAST WITH LITTLE TIME TO REACT. I REALIZE MY RESPONSIBILITY AS VFR TO MAINTAIN ACFT SEP, WHICH I DID, BUT THE TWR SOUNDED AS THOUGH THEY DIDN'T EVEN KNOW I WAS IN THE ATA AND WAS UNAWARE OF MY APCH. TFC ADVISORY FROM THE TWR WOULD HAVE BEEN NICE.

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.

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