BK117 helicopter pilot has near midair collision on approach to jwn.

Attributes
ACN	432892
Time
Date	199904
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : jwn.airport
State Reference	TN
Altitude	agl single value : 100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Helicopter
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	None
Aircraft 2
Make Model Name	Cessna 140
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual arrival : vfr
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument pilot : atp
Experience	flight time last 90 days : 40 flight time total : 5200 flight time type : 650
ASRS Report	432892
Person 2
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : required legal separation non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Miss Distance	horizontal : 300
Supplementary
Problem Areas	Airspace Structure Airport Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During an operational check flight, while on approach to runway, I did not see an airplane that was obviously on short final. I made my approach to the sod adjacent to runway. At about 100 ft AGL, I looked to my left and saw this airplane pass by my aircraft within about 300 ft. I was monitoring unicom frequency and heard no radio calls. I was also flying left traffic pattern as to avoid the flow of fixed wing aircraft. This runway uses right traffic normally. Neither aircraft made any evasive maneuvers. I think this was a case of a high wing aircraft not being able to see up, and a helicopter not having good visibility seeing down on approach. I was also busy monitoring engine instruments as an engine component was being checked.

Original NASA ASRS Text

Title: BK117 HELI PLT HAS NMAC ON APCH TO JWN.

Narrative: DURING AN OPERATIONAL CHK FLT, WHILE ON APCH TO RWY, I DID NOT SEE AN AIRPLANE THAT WAS OBVIOUSLY ON SHORT FINAL. I MADE MY APCH TO THE SOD ADJACENT TO RWY. AT ABOUT 100 FT AGL, I LOOKED TO MY L AND SAW THIS AIRPLANE PASS BY MY ACFT WITHIN ABOUT 300 FT. I WAS MONITORING UNICOM FREQ AND HEARD NO RADIO CALLS. I WAS ALSO FLYING L TFC PATTERN AS TO AVOID THE FLOW OF FIXED WING ACFT. THIS RWY USES R TFC NORMALLY. NEITHER ACFT MADE ANY EVASIVE MANEUVERS. I THINK THIS WAS A CASE OF A HIGH WING ACFT NOT BEING ABLE TO SEE UP, AND A HELI NOT HAVING GOOD VISIBILITY SEEING DOWN ON APCH. I WAS ALSO BUSY MONITORING ENG INSTS AS AN ENG COMPONENT WAS BEING CHKED.

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.