Narrative:

After lifting off from a touch-and-go with a pre-solo student on apc runway 18R, we had to immediately take evasive action to avoid a midair with aircraft Y which appeared to be setting up for a landing on runway 36L. I immediately advised the tower of my predicament and intentions. They replied that they were not in contact with the aircraft, nor were given any heads up from ZOA that anyone was on the localizer runway 36L approach. Aircraft Y had violated numerous FARS from my standpoint: 1) entered class D airspace without communicating with the tower. 2) possibly flew an approach without being cleared. 3) if he was flying the approach, went well below MDA. 4) went to the left (possibly as per missed approach procedure) as opposed to right for collision avoidance.

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Original NASA ASRS Text

Title: DEPARTING GA ACFT FROM APC ARPT TAKES EVASIVE ACTION ON INITIAL TKOF DUE TO AN UNKNOWN OPPOSITE DIRECTION GA ACFT ON APCH.

Narrative: AFTER LIFTING OFF FROM A TOUCH-AND-GO WITH A PRE-SOLO STUDENT ON APC RWY 18R, WE HAD TO IMMEDIATELY TAKE EVASIVE ACTION TO AVOID A MIDAIR WITH ACFT Y WHICH APPEARED TO BE SETTING UP FOR A LNDG ON RWY 36L. I IMMEDIATELY ADVISED THE TWR OF MY PREDICAMENT AND INTENTIONS. THEY REPLIED THAT THEY WERE NOT IN CONTACT WITH THE ACFT, NOR WERE GIVEN ANY HEADS UP FROM ZOA THAT ANYONE WAS ON THE LOC RWY 36L APCH. ACFT Y HAD VIOLATED NUMEROUS FARS FROM MY STANDPOINT: 1) ENTERED CLASS D AIRSPACE WITHOUT COMMUNICATING WITH THE TWR. 2) POSSIBLY FLEW AN APCH WITHOUT BEING CLRED. 3) IF HE WAS FLYING THE APCH, WENT WELL BELOW MDA. 4) WENT TO THE L (POSSIBLY AS PER MISSED APCH PROC) AS OPPOSED TO R FOR COLLISION AVOIDANCE.

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.