A passenger/pilot reported passing 30 feet overhead an aircraft which entered S12 runway 16 without ...

Attributes
ACN	1197568
Time
Date	201408
Local Time Of Day	1201-1800
Place
Locale Reference	S12.Airport
State Reference	OR
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Person 1
Function	Other / Unknown
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 15 Flight Crew Total 120 Flight Crew Type 0
Events
Anomaly	Conflict Ground Conflict Critical Deviation - Procedural Published Material / Policy Ground Incursion Runway
Miss Distance	Horizontal 15 Vertical 30

Narrative:

I was in the process of aircraft shopping. I arranged for a test flight with the owner once I'd inspected the aircraft on the ramp. We agreed that he would fly; while I would monitor engine instrumentation/performance. We planned a few trips around the pattern. We taxied to runway 34 and did run ups in preparation for departure. I asked for several additional items above and beyond the standard mag/carb heat checks. During that time; two other aircraft were talking on the CTAF which is shared with several area airports. The PIC made the appropriate CTAF departure call and lined up on 34. We began our departure; and upon rotation; we heard a call 'xxxxx; uhh; vacating runway 16?' we passed nearly directly overhead of the aircraft which had been preparing to depart 16; missing by about 30 feet vertically. The PIC banked to the right after a few seconds. The PIC and I were shaken; and we confirmed with one another that neither of us had heard any previous calls from the aircraft. The sun angle was such that it was difficult to see to from the 34 end of the runway to the 16 end. Additionally; both the PIC and I were distracted by the sales process and the long run-up checks. There had been traffic on both 16 and 34 earlier in the day when I had flown in. I had elected to use 34 when I landed about two hours prior. Wind conditions were calm. 34 is the preferred calm wind runway at S12.

Original NASA ASRS Text

Title: A passenger/pilot reported passing 30 feet overhead an aircraft which entered S12 Runway 16 without CTAF communications during his takeoff from Runway 34 into an interfering sun.

Narrative: I was in the process of aircraft shopping. I arranged for a test flight with the owner once I'd inspected the aircraft on the ramp. We agreed that he would fly; while I would monitor engine instrumentation/performance. We planned a few trips around the pattern. We taxied to Runway 34 and did run ups in preparation for departure. I asked for several additional items above and beyond the standard mag/carb heat checks. During that time; two other aircraft were talking on the CTAF which is shared with several area airports. The PIC made the appropriate CTAF departure call and lined up on 34. We began our departure; and upon rotation; we heard a call 'XXXXX; uhh; vacating Runway 16?' We passed nearly directly overhead of the aircraft which had been preparing to depart 16; missing by about 30 feet vertically. The PIC banked to the right after a few seconds. The PIC and I were shaken; and we confirmed with one another that neither of us had heard any previous calls from the aircraft. The sun angle was such that it was difficult to see to from the 34 end of the runway to the 16 end. Additionally; both the PIC and I were distracted by the sales process and the long run-up checks. There had been traffic on both 16 and 34 earlier in the day when I had flown in. I had elected to use 34 when I landed about two hours prior. Wind conditions were calm. 34 is the preferred calm wind runway at S12.

Data retrieved from NASA's ASRS site 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.

A passenger/pilot reported passing 30 feet overhead an aircraft which entered S12 runway 16 without CTAF communications during his takeoff from runway 34 into an interfering sun.