VFR traffic at act crosses under a C414 at 1800 ft on an ILS approach.

Attributes
ACN	469925
Time
Date	200004
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : act.airport
State Reference	TX
Altitude	msl single value : 2000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : act.tracon
Operator	general aviation : personal
Make Model Name	Chancellor 414A & C414
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 19
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 5 controller time certified in position1 : 6
ASRS Report	469925
Person 2
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : multi engine pilot : instrument
Events
Anomaly	conflict : airborne less severe
Independent Detector	other controllera
Resolutory Action	controller : issued advisory
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance
Primary Problem	Airspace Structure

Narrative:

Due to lack of a requirement for an aircraft to contact ATC, a VFR crossed the final approach course just outside the class D airspace. It crossed the OM at 1600 ft with another aircraft on the ILS 2 mi outside the OM. Callback conversation with reporter revealed the following information: reporter stated the VFR traffic was spotted by the IFR pilot after a TA was issued. Reporter said this type of occurrence happens about once a month. I mentioned to the reporter than an extension to the act class D might be suggested to provide airspace protection around the runway 19 OM.

Original NASA ASRS Text

Title: VFR TFC AT ACT CROSSES UNDER A C414 AT 1800 FT ON AN ILS APCH.

Narrative: DUE TO LACK OF A REQUIREMENT FOR AN ACFT TO CONTACT ATC, A VFR CROSSED THE FINAL APCH COURSE JUST OUTSIDE THE CLASS D AIRSPACE. IT CROSSED THE OM AT 1600 FT WITH ANOTHER ACFT ON THE ILS 2 MI OUTSIDE THE OM. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE VFR TFC WAS SPOTTED BY THE IFR PLT AFTER A TA WAS ISSUED. RPTR SAID THIS TYPE OF OCCURRENCE HAPPENS ABOUT ONCE A MONTH. I MENTIONED TO THE RPTR THAN AN EXTENSION TO THE ACT CLASS D MIGHT BE SUGGESTED TO PROVIDE AIRSPACE PROTECTION AROUND THE RWY 19 OM.

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.