Narrative:

Psm approach control ARTS/pidp out of service. Approached psm from south with authority/authorized from psm tower to go through the psm air traffic area en route to 3BY. About 2 mi northeast of psm asked for and received approval to go to 3BY unicom and leave psm tower frequency at 1500' MSL. I proceeded eastbound over 3BY to check windsock, call unicom and check for traffic below me in the pattern. I entered left downwind for runway 12 at 3BY still looking for traffic. As I turned final, the unicom operator told me to watch out above me. (I was in a steep descent). I looked up and saw an medium large transport coming right at me. (Very slightly above me). Increased my rate of descent and the medium large transport passed right over me about 300'. I then encountered wake turbulence and initiated a go around to reenter the pattern. My landing light was on the whole time from when I first entered the psm air traffic area until I ended my flight. I later called psm approach to talk to controller there. They said with their ARTS/pidp out of service that when they cleared the medium large transport for a visibility approach they have no way of knowing his altitude. They also stated that at the time of the incident, the psm tower had the aircraft. I felt that the military flight crew should know better than to fly so low over an uncontrolled airport. Also psm tower personnel should have seen out their windows that the medium large transport was low over 3BY. I also feel that psm approach could see the 3 primary targets working at 3BY and issue an advisory or altitude restriction to the medium large transport. The pilot of the medium large transport never complained to psm ATC leading me to believe that he never saw me or did not care.

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Original NASA ASRS Text

Title: MIL ACFT LNDG AT NEAR BY MIL ARPT FLEW OVER A NONCTLED CIVILIAN ARPT AT A LOW ALT AND NEARLY COLLIDED WITH AN ACFT IN THE TFC PATTERN.

Narrative: PSM APCH CTL ARTS/PIDP OUT OF SVC. APCHED PSM FROM S WITH AUTH FROM PSM TWR TO GO THROUGH THE PSM ATA ENRTE TO 3BY. ABOUT 2 MI NE OF PSM ASKED FOR AND RECEIVED APPROVAL TO GO TO 3BY UNICOM AND LEAVE PSM TWR FREQ AT 1500' MSL. I PROCEEDED EBND OVER 3BY TO CHK WINDSOCK, CALL UNICOM AND CHK FOR TFC BELOW ME IN THE PATTERN. I ENTERED L DOWNWIND FOR RWY 12 AT 3BY STILL LOOKING FOR TFC. AS I TURNED FINAL, THE UNICOM OPERATOR TOLD ME TO WATCH OUT ABOVE ME. (I WAS IN A STEEP DSNT). I LOOKED UP AND SAW AN MLG COMING RIGHT AT ME. (VERY SLIGHTLY ABOVE ME). INCREASED MY RATE OF DSNT AND THE MLG PASSED R OVER ME ABOUT 300'. I THEN ENCOUNTERED WAKE TURB AND INITIATED A GO AROUND TO REENTER THE PATTERN. MY LNDG LIGHT WAS ON THE WHOLE TIME FROM WHEN I FIRST ENTERED THE PSM ATA UNTIL I ENDED MY FLT. I LATER CALLED PSM APCH TO TALK TO CTLR THERE. THEY SAID WITH THEIR ARTS/PIDP OUT OF SVC THAT WHEN THEY CLRED THE MLG FOR A VIS APCH THEY HAVE NO WAY OF KNOWING HIS ALT. THEY ALSO STATED THAT AT THE TIME OF THE INCIDENT, THE PSM TWR HAD THE ACFT. I FELT THAT THE MIL FLT CREW SHOULD KNOW BETTER THAN TO FLY SO LOW OVER AN UNCTLED ARPT. ALSO PSM TWR PERSONNEL SHOULD HAVE SEEN OUT THEIR WINDOWS THAT THE MLG WAS LOW OVER 3BY. I ALSO FEEL THAT PSM APCH COULD SEE THE 3 PRIMARY TARGETS WORKING AT 3BY AND ISSUE AN ADVISORY OR ALT RESTRICTION TO THE MLG. THE PLT OF THE MLG NEVER COMPLAINED TO PSM ATC LEADING ME TO BELIEVE THAT HE NEVER SAW ME OR DID NOT CARE.

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.