<< >> NASA ASRS Report 341646, July 1996

Near midair collision between a C180 skywagon and an ultralight near a non tower airport unicom. See and avoid utilized at the last moment. Evasive action turn.

Attributes
ACN	341646
Time
Date	199607
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : 08a
State Reference	AL
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : 08a
Operator	general aviation : corporate
Make Model Name	Cessna 180 Skywagon
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : cfi pilot : instrument pilot : commercial
Experience	flight time last 90 days : 120 flight time total : 7400 flight time type : 3500
ASRS Report	341646
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 70 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

My pipeline patrol goes through the traffic pattern at this airport. Unicom (CTAF) was called 5 mi out but no reply was received. I broadcast my intentions and proceeded through the area. An ultralight appeared at about 45 degrees left of my aircraft crossing left to right. I took evasive action (the other pilot may have, I did not see). I looked at the airport information later and noticed the ultralights are requested to restrict their pattern to the southeast side of the airport. He/she was complying with this. Contributing factors include: we were both looking into the sun. The winds were calm and either runway could have been used. Unicom did not reply to advisory request. The ultralight may not have been radio equipped. My attention was diverted to the gas pipeline I patrol. I assumed the area was unoccupied because no one answered my radio request.

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Original NASA ASRS Text

Title: NMAC BTWN A C180 SKYWAGON AND AN ULTRALIGHT NEAR A NON TWR ARPT UNICOM. SEE AND AVOID UTILIZED AT THE LAST MOMENT. EVASIVE ACTION TURN.

Narrative: MY PIPELINE PATROL GOES THROUGH THE TFC PATTERN AT THIS ARPT. UNICOM (CTAF) WAS CALLED 5 MI OUT BUT NO REPLY WAS RECEIVED. I BROADCAST MY INTENTIONS AND PROCEEDED THROUGH THE AREA. AN ULTRALIGHT APPEARED AT ABOUT 45 DEGS L OF MY ACFT XING L TO R. I TOOK EVASIVE ACTION (THE OTHER PLT MAY HAVE, I DID NOT SEE). I LOOKED AT THE ARPT INFO LATER AND NOTICED THE ULTRALIGHTS ARE REQUESTED TO RESTRICT THEIR PATTERN TO THE SE SIDE OF THE ARPT. HE/SHE WAS COMPLYING WITH THIS. CONTRIBUTING FACTORS INCLUDE: WE WERE BOTH LOOKING INTO THE SUN. THE WINDS WERE CALM AND EITHER RWY COULD HAVE BEEN USED. UNICOM DID NOT REPLY TO ADVISORY REQUEST. THE ULTRALIGHT MAY NOT HAVE BEEN RADIO EQUIPPED. MY ATTN WAS DIVERTED TO THE GAS PIPELINE I PATROL. I ASSUMED THE AREA WAS UNOCCUPIED BECAUSE NO ONE ANSWERED MY RADIO REQUEST.

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.