GA small aircraft unauthorized penetration of ord TCA and near midair collision with air carrier air...

Attributes
ACN	148253
Time
Date	199006
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ord airport : 06c
State Reference	IL
Altitude	msl bound lower : 1700 msl bound upper : 1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 7 flight time total : 400 flight time type : 130
ASRS Report	148253
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : exited penetrated airspace none taken : insufficient time
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 300 vertical : 150
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flying alone, I had left lake-in-the-hills airport (il) returning to schaumburg airport (il), flying VFR. I used a compass heading of 140 degrees to intercept ord VOR (113.9 MHZ) radial 90 degrees. This was to put me over schaumburg airport, but the point of intercept put me east of schaumburg airport. I erroneously assumed that I was west of schaumburg airport and headed east on the VOR radial until the ord ILS OM indicator light and audible warning activated approximately 5 mi from ord. Realizing my location, I made a 90 degree right turn, going south for a few mins to clear the ILS approach, and then another 90 degrees right heading west to exit the ord TCA. On my way out I passed a twin engine commercial aircraft heading east. We were separated by approximately 300' horizontal and 150' vertical. My altitude at the time was 1700' MSL. I cleared the ord TCA with no further incident. My time within the ord TCA was estimated at 6 mins, altitude 1700-1800' MSL. No radio contact with ord control tower was made. A phone report was made upon landing at schaumburg airport.

Original NASA ASRS Text

Title: GA SMA UNAUTH PENETRATION OF ORD TCA AND NMAC WITH ACR ACFT.

Narrative: FLYING ALONE, I HAD LEFT LAKE-IN-THE-HILLS ARPT (IL) RETURNING TO SCHAUMBURG ARPT (IL), FLYING VFR. I USED A COMPASS HDG OF 140 DEGS TO INTERCEPT ORD VOR (113.9 MHZ) RADIAL 90 DEGS. THIS WAS TO PUT ME OVER SCHAUMBURG ARPT, BUT THE POINT OF INTERCEPT PUT ME E OF SCHAUMBURG ARPT. I ERRONEOUSLY ASSUMED THAT I WAS W OF SCHAUMBURG ARPT AND HEADED E ON THE VOR RADIAL UNTIL THE ORD ILS OM INDICATOR LIGHT AND AUDIBLE WARNING ACTIVATED APPROX 5 MI FROM ORD. REALIZING MY LOCATION, I MADE A 90 DEG RIGHT TURN, GOING S FOR A FEW MINS TO CLR THE ILS APCH, AND THEN ANOTHER 90 DEGS RIGHT HDG W TO EXIT THE ORD TCA. ON MY WAY OUT I PASSED A TWIN ENG COMMERCIAL ACFT HDG E. WE WERE SEPARATED BY APPROX 300' HORIZ AND 150' VERT. MY ALT AT THE TIME WAS 1700' MSL. I CLRED THE ORD TCA WITH NO FURTHER INCIDENT. MY TIME WITHIN THE ORD TCA WAS ESTIMATED AT 6 MINS, ALT 1700-1800' MSL. NO RADIO CONTACT WITH ORD CTL TWR WAS MADE. A PHONE RPT WAS MADE UPON LNDG AT SCHAUMBURG ARPT.

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.

GA small aircraft unauthorized penetration of ord TCA and near midair collision with air carrier aircraft.