Potential conflict in a night operation at a non tower airport CTAF.

Attributes
ACN	293554
Time
Date	199501
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : s50
State Reference	WA
Altitude	msl bound lower : 500 msl bound upper : 500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : go around other
Route In Use	approach : visual
Flight Plan	None
Aircraft 2
Operator	general aviation : instructional
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : go around other
Route In Use	approach : straight in approach : visual
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 30 flight time total : 1960 flight time type : 1660
ASRS Report	293554
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : student
Events
Anomaly	conflict : airborne less severe non adherence : published procedure other spatial deviation other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

En route to auburn airport (S50) from pierce county (IS0), I determined auburn was using runway 16. 2 aircraft announced they were using runway 16 at auburn. The wind was 120 degrees at 5 KTS (seatac ATIS). Upon arrival at auburn, I announced entering a right downwind for runway 16, auburn. Midfield, I noticed the wind tee was pointed east. Then I heard another aircraft announcing he was entering a left downwind for runway 34, touch-and-go. The transmission was weak and no airport was stated. I announced turn to base for runway 16, auburn, and then turn to final, runway 16, auburn. On final, as I passed over the power lines, I noticed lights on an aircraft or helicopter descending towards runway 34. I banked my aircraft to the east. The other aircraft banked west. As we passed I observed it was a cessna 152. I flew a wide pattern around the airport, to re- enter the left downwind for runway 34, behind the cessna 152. I announced my position, downwind, base and final. The cessna 152 was silent. I believe the cessna 152 pilot was a student. He was using runway 34 to avoid crossing the pwrlines at the north end of the field. Since I didn't see him on entering the pattern, he either entered base or was making a straight-in approach to an uncontrolled airport at night. The purpose of this write-up is to ask you to publish the need for everyone to broadcast 'blind' at uncontrolled airports at their entry into downwind, base and final, and to preface and end their transmission with the name of the airport! At night, don't fly a straight-in approach to an uncontrolled airport. Transmit your position and listen for other traffic.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT IN A NIGHT OP AT A NON TWR ARPT CTAF.

Narrative: ENRTE TO AUBURN ARPT (S50) FROM PIERCE COUNTY (IS0), I DETERMINED AUBURN WAS USING RWY 16. 2 ACFT ANNOUNCED THEY WERE USING RWY 16 AT AUBURN. THE WIND WAS 120 DEGS AT 5 KTS (SEATAC ATIS). UPON ARR AT AUBURN, I ANNOUNCED ENTERING A R DOWNWIND FOR RWY 16, AUBURN. MIDFIELD, I NOTICED THE WIND TEE WAS POINTED E. THEN I HEARD ANOTHER ACFT ANNOUNCING HE WAS ENTERING A L DOWNWIND FOR RWY 34, TOUCH-AND-GO. THE XMISSION WAS WEAK AND NO ARPT WAS STATED. I ANNOUNCED TURN TO BASE FOR RWY 16, AUBURN, AND THEN TURN TO FINAL, RWY 16, AUBURN. ON FINAL, AS I PASSED OVER THE PWR LINES, I NOTICED LIGHTS ON AN ACFT OR HELI DSNDING TOWARDS RWY 34. I BANKED MY ACFT TO THE E. THE OTHER ACFT BANKED W. AS WE PASSED I OBSERVED IT WAS A CESSNA 152. I FLEW A WIDE PATTERN AROUND THE ARPT, TO RE- ENTER THE L DOWNWIND FOR RWY 34, BEHIND THE CESSNA 152. I ANNOUNCED MY POS, DOWNWIND, BASE AND FINAL. THE CESSNA 152 WAS SILENT. I BELIEVE THE CESSNA 152 PLT WAS A STUDENT. HE WAS USING RWY 34 TO AVOID XING THE PWRLINES AT THE N END OF THE FIELD. SINCE I DIDN'T SEE HIM ON ENTERING THE PATTERN, HE EITHER ENTERED BASE OR WAS MAKING A STRAIGHT-IN APCH TO AN UNCTLED ARPT AT NIGHT. THE PURPOSE OF THIS WRITE-UP IS TO ASK YOU TO PUBLISH THE NEED FOR EVERYONE TO BROADCAST 'BLIND' AT UNCTLED ARPTS AT THEIR ENTRY INTO DOWNWIND, BASE AND FINAL, AND TO PREFACE AND END THEIR XMISSION WITH THE NAME OF THE ARPT! AT NIGHT, DON'T FLY A STRAIGHT-IN APCH TO AN UNCTLED ARPT. XMIT YOUR POS AND LISTEN FOR OTHER TFC.

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.