An small aircraft pilot while on final at smo had an near midair collision with another small aircra...

Attributes
ACN	520578
Time
Date	200108
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : smo.vor
State Reference	CA
Altitude	msl single value : 1200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : smo.tower tracon : a11.tracon
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : smo.tower
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : instrument pilot : multi engine pilot : commercial pilot : cfi
Experience	flight time last 90 days : 260 flight time total : 1090 flight time type : 610
ASRS Report	520578
Person 2
Affiliation	other
Function	flight crew : single pilot instruction : trainee
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	other
Miss Distance	vertical : 100
Supplementary
Problem Areas	Airport Flight Crew Human Performance ATC Facility ATC Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

After reporting to ATC (smo ATC tower) I had traffic at my 3 O'clock position on final approach in sight, smo tower control advised me to follow that traffic and I was #3 for landing. Upon completing my turn to final approach the tower controller made a radio call attempting to communicate with aircraft Y. Several attempts (4-6) were made to no avail. Simultaneous to the last attempt by the tower controller, aircraft Y appeared directly above my aircraft. I made an immediate turn for the downwind (right turn). I am not done investigating this for my own satisfaction but I feel the primary cause for this near midair collision results from the tower controller clearing my aircraft for approach. Another contributing factor is a failure to communicate with smo tower by aircraft Y.

Original NASA ASRS Text

Title: AN SMA PLT WHILE ON FINAL AT SMO HAD AN NMAC WITH ANOTHER SMA ACFT.

Narrative: AFTER RPTING TO ATC (SMO ATC TWR) I HAD TFC AT MY 3 O'CLOCK POS ON FINAL APCH IN SIGHT, SMO TWR CTL ADVISED ME TO FOLLOW THAT TFC AND I WAS #3 FOR LNDG. UPON COMPLETING MY TURN TO FINAL APCH THE TWR CTLR MADE A RADIO CALL ATTEMPTING TO COMMUNICATE WITH ACFT Y. SEVERAL ATTEMPTS (4-6) WERE MADE TO NO AVAIL. SIMULTANEOUS TO THE LAST ATTEMPT BY THE TWR CTLR, ACFT Y APPEARED DIRECTLY ABOVE MY ACFT. I MADE AN IMMEDIATE TURN FOR THE DOWNWIND (R TURN). I AM NOT DONE INVESTIGATING THIS FOR MY OWN SATISFACTION BUT I FEEL THE PRIMARY CAUSE FOR THIS NMAC RESULTS FROM THE TWR CTLR CLRING MY ACFT FOR APCH. ANOTHER CONTRIBUTING FACTOR IS A FAILURE TO COMMUNICATE WITH SMO TWR BY ACFT Y.

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.

An small aircraft pilot while on final at smo had an near midair collision with another small aircraft aircraft.