Commuter light transport has near midair collision with small transport in pattern. No TA given.

Attributes
ACN	228557
Time
Date	199211
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : laf
State Reference	IN
Altitude	agl bound lower : 400 agl bound upper : 400
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tower : laf
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 210 flight time total : 2100 flight time type : 600
ASRS Report	228557
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 350 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On ILS approach to controled non-radar airport, broke out of IMC at 1000 ft, visibility 3 mi fog and haze. Was cleared to land at LOM at about 400 ft AGL, noticed an small transport was turning right base to final right at us (they obviously did not see us). I immediately executed climbing left turn to avoid a collision. Cause: tower never informed us of VFR traffic in pattern. Small transport not looking for us or anyone on final approach. Near miss report filed to FAA through company. The 'see and avoid' concept of the FAA's does not work during reduced visibility. The country needs new radar facilities to separate traffic.

Original NASA ASRS Text

Title: COMMUTER LTT HAS NMAC WITH SMT IN PATTERN. NO TA GIVEN.

Narrative: ON ILS APCH TO CTLED NON-RADAR ARPT, BROKE OUT OF IMC AT 1000 FT, VISIBILITY 3 MI FOG AND HAZE. WAS CLRED TO LAND AT LOM AT ABOUT 400 FT AGL, NOTICED AN SMT WAS TURNING R BASE TO FINAL RIGHT AT US (THEY OBVIOUSLY DID NOT SEE US). I IMMEDIATELY EXECUTED CLBING L TURN TO AVOID A COLLISION. CAUSE: TWR NEVER INFORMED US OF VFR TFC IN PATTERN. SMT NOT LOOKING FOR US OR ANYONE ON FINAL APCH. NEAR MISS RPT FILED TO FAA THROUGH COMPANY. THE 'SEE AND AVOID' CONCEPT OF THE FAA'S DOES NOT WORK DURING REDUCED VISIBILITY. THE COUNTRY NEEDS NEW RADAR FACILITIES TO SEPARATE 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.