Small aircraft X had near midair collision with small aircraft Y on departure.

Attributes
ACN	161849
Time
Date	199010
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pao
State Reference	CA
Altitude	msl bound lower : 1400 msl bound upper : 1400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pao
Operator	other
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : initial
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 1560 flight time type : 500
ASRS Report	161859
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated faa : reviewed incident with flight crew
Miss Distance	horizontal : 150 vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

Sna X departed pao runway 30 for a dumbarton left departure. Tracked straight out from runway centerline to dumbarton automatic bridge. Cleared left and began left turn (climbing) out of 1000' MSL for 2000'. Approaching us 101 (freeway) and out of 1400' MSL, small aircraft Y appeared directly above and in front, moving from left to right (appeared out left wing blind area). Called pao tower immediately asking where small aircraft Y came from, with no response. Tower responded that the aircraft was overtaking us on the left. She had us in sight, 'not a problem.' I replied, 'not a problem for you!!' I received call at flying club telling me to contact tower supervisor. I contacted tower supervisor and he said he would review tapes. He did and he got right back to me advising me that the near miss was caused by a 'training error' in the tower. 2 controllers were on duty, and in confusion, small aircraft Y was not advised of my departure ahead of her, nor was my direction (type) first officer departure mentioned. Small aircraft Y was a straight out departure for sql. Her departure was not very 'straight,' and she lost sight of me or had another aircraft in sight. She also made an early frequency change from pao to sql.

Original NASA ASRS Text

Title: SMA X HAD NMAC WITH SMA Y ON DEP.

Narrative: SNA X DEPARTED PAO RWY 30 FOR A DUMBARTON LEFT DEP. TRACKED STRAIGHT OUT FROM RWY CENTERLINE TO DUMBARTON AUTO BRIDGE. CLRED LEFT AND BEGAN LEFT TURN (CLBING) OUT OF 1000' MSL FOR 2000'. APCHING U.S. 101 (FREEWAY) AND OUT OF 1400' MSL, SMA Y APPEARED DIRECTLY ABOVE AND IN FRONT, MOVING FROM LEFT TO RIGHT (APPEARED OUT LEFT WING BLIND AREA). CALLED PAO TWR IMMEDIATELY ASKING WHERE SMA Y CAME FROM, WITH NO RESPONSE. TWR RESPONDED THAT THE ACFT WAS OVERTAKING US ON THE LEFT. SHE HAD US IN SIGHT, 'NOT A PROB.' I REPLIED, 'NOT A PROB FOR YOU!!' I RECEIVED CALL AT FLYING CLUB TELLING ME TO CONTACT TWR SUPVR. I CONTACTED TWR SUPVR AND HE SAID HE WOULD REVIEW TAPES. HE DID AND HE GOT RIGHT BACK TO ME ADVISING ME THAT THE NEAR MISS WAS CAUSED BY A 'TRNING ERROR' IN THE TWR. 2 CTLRS WERE ON DUTY, AND IN CONFUSION, SMA Y WAS NOT ADVISED OF MY DEP AHEAD OF HER, NOR WAS MY DIRECTION (TYPE) FO DEP MENTIONED. SMA Y WAS A STRAIGHT OUT DEP FOR SQL. HER DEP WAS NOT VERY 'STRAIGHT,' AND SHE LOST SIGHT OF ME OR HAD ANOTHER ACFT IN SIGHT. SHE ALSO MADE AN EARLY FREQ CHANGE FROM PAO TO SQL.

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.