Near midair collision.

Attributes
ACN	249708
Time
Date	199308
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mt81
State Reference	MT
Altitude	msl bound lower : 7200 msl bound upper : 7200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach descent other
Route In Use	enroute : direct
Flight Plan	None
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 15 flight time total : 60 flight time type : 60
ASRS Report	249708
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I contacted FSS and reported my position 4 mi south of manhattan. FSS gave me altimeter, winds, and preferred runway. FSS also reported traffic as an aircraft preparing for takeoff on runway 30. I next reported my position 4 mi southwest of the runway shortly after seeing the other aircraft takeoff. I heard aircraft report that he would be picking up the 275 degree radial out of belgrade which would bring him near my position. I did not immediately locate his position. FSS called to ask my present altitude which I reported as 7200 ft and descending. Immediately after this transmission, the aircraft passed directly below me. No evasive action was taken as there was insufficient time once the other aircraft was spotted. I believe the problem was contributed to by the following: imprecise reporting of my position with regard to local landmarks, VOR, etc. Planned use of a straight-in final instead of entering a normal pattern. The other pilot apparently never did locate my position.

Original NASA ASRS Text

Title: NMAC.

Narrative: I CONTACTED FSS AND RPTED MY POS 4 MI S OF MANHATTAN. FSS GAVE ME ALTIMETER, WINDS, AND PREFERRED RWY. FSS ALSO RPTED TFC AS AN ACFT PREPARING FOR TKOF ON RWY 30. I NEXT RPTED MY POS 4 MI SW OF THE RWY SHORTLY AFTER SEEING THE OTHER ACFT TKOF. I HEARD ACFT RPT THAT HE WOULD BE PICKING UP THE 275 DEG RADIAL OUT OF BELGRADE WHICH WOULD BRING HIM NEAR MY POS. I DID NOT IMMEDIATELY LOCATE HIS POS. FSS CALLED TO ASK MY PRESENT ALT WHICH I RPTED AS 7200 FT AND DSNDING. IMMEDIATELY AFTER THIS XMISSION, THE ACFT PASSED DIRECTLY BELOW ME. NO EVASIVE ACTION WAS TAKEN AS THERE WAS INSUFFICIENT TIME ONCE THE OTHER ACFT WAS SPOTTED. I BELIEVE THE PROB WAS CONTRIBUTED TO BY THE FOLLOWING: IMPRECISE RPTING OF MY POS WITH REGARD TO LCL LANDMARKS, VOR, ETC. PLANNED USE OF A STRAIGHT-IN FINAL INSTEAD OF ENTERING A NORMAL PATTERN. THE OTHER PLT APPARENTLY NEVER DID LOCATE MY POS.

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.