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

Attributes
ACN	283590
Time
Date	199409
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pao
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pao tracon : jax
Operator	general aviation : personal
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	other
Aircraft 2
Operator	general aviation : personal
Make Model Name	Grumman American Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	other
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
ASRS Report	283590
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	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Primary Problem	ATC Human Performance

Narrative:

While working a rush I made a traffic call to bonanza X of traffic 12 O'clock 1/2 mi nebound grumman Y. No traffic call was made to the grumman. At the time traffic was moderately busy and my attention was split between traffic calls and sequencing a very busy pattern. WX was restricting visibility making it difficult for aircraft in the pattern to follow traffic. At the time of the incident the only thing mentioned on frequency was a comment by the bonanza pilot that the grumman was within 300 ft. I was informed that grumman Y filed a near mid-air.

Original NASA ASRS Text

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

Narrative: WHILE WORKING A RUSH I MADE A TFC CALL TO BONANZA X OF TFC 12 O'CLOCK 1/2 MI NEBOUND GRUMMAN Y. NO TFC CALL WAS MADE TO THE GRUMMAN. AT THE TIME TFC WAS MODERATELY BUSY AND MY ATTN WAS SPLIT BTWN TFC CALLS AND SEQUENCING A VERY BUSY PATTERN. WX WAS RESTRICTING VISIBILITY MAKING IT DIFFICULT FOR ACFT IN THE PATTERN TO FOLLOW TFC. AT THE TIME OF THE INCIDENT THE ONLY THING MENTIONED ON FREQ WAS A COMMENT BY THE BONANZA PLT THAT THE GRUMMAN WAS WITHIN 300 FT. I WAS INFORMED THAT GRUMMAN Y FILED A NEAR MID-AIR.

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.