Flight crew of light transport had near midair collision with small aircraft on approach to jgg.

Attributes
ACN	188254
Time
Date	199108
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : jgg
State Reference	VA
Altitude	msl bound lower : 1100 msl bound upper : 1100
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : jgg
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach landing other
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent : approach landing other other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 2900 flight time type : 180
ASRS Report	188254
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Events
Anomaly	conflict : nmac other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : became reoriented
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 100 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was turned onto the NDB approach, with tailwind. I misjudged wind strength, and flew through the approach course by perhaps 1/2 to 3/4 mi. I turned the aircraft back to intercept, and immediately saw an small aircraft which had drifted into the approach path. Tower also noticed, and issued me an immediate turn. The small aircraft had been in the pattern doing touch and go. Apparently the severely reduced visibility caused him to lose track of his ground track. Following this, the tower cancelled permission for all aircraft in the pattern to continue touch and go, and the field went IFR. I called the controller on the land line to inquire, but found him to be somewhat defensive. The conversation was non- productive. Conclusion: because I fly in and out of large airports, virtually all with ILS/localizer/VOR approachs, I was rusty on NDB approachs. Had I not flown through final, though, we would have been much closer to the other aircraft.

Original NASA ASRS Text

Title: FLC OF LTT HAD NMAC WITH SMA ON APCH TO JGG.

Narrative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

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.