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A PA28 cherokee private pilot has an near midair collision with a climbing airline at 10500 ft 14 mi northeast of ord, il.
| Attributes | |
| ACN | 476385 |
| Time | |
| Date | 200006 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl single value : 10500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | general aviation : personal |
| Make Model Name | PA-28 Cherokee Arrow IV |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | enroute : direct |
| Flight Plan | None |
| Aircraft 2 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Experience | flight time last 90 days : 25 flight time total : 700 flight time type : 250 |
| ASRS Report | 476385 |
| Person 2 | |
| Affiliation | other |
| Function | observation : passenger |
| Qualification | other other : wife |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other other : pax 2 |
| Resolutory Action | flight crew : took evasive action |
| Consequence | other |
| Miss Distance | horizontal : 0 vertical : 300 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Cruising in our cherokee 235 from gary, in, to waukesha, wi, VFR at 10500 ft, over O'hare's airspace, squawking 1200 with mode C turned on, my wife spotted a twin engine airliner (engines mounted on wings) approaching us from our left apparently climbing out from O'hare. On initial sighting it was estimated 1 mi away and appeared to be on a collision course with us. I descended slightly and it passed directly over us, estimated 300 ft above us. I don't believe the other pilots saw us as they took no evasive action. I do not understand how this happened as it is my understanding that ground controllers have radar which idents us as VFR traffic and they know our position, speed, direction of flight and altitude. Also I believe most or all airliners are TCASII equipped and they have the same information in their cockpit. I'm not sure what the minimum separation requirement is in this type of situation (VFR) but this was too close for comfort. Suggest you review radar and communication tapes and find out how it happened.
Original NASA ASRS Text
Title: A PA28 CHEROKEE PVT PLT HAS AN NMAC WITH A CLBING AIRLINE AT 10500 FT 14 MI NE OF ORD, IL.
Narrative: CRUISING IN OUR CHEROKEE 235 FROM GARY, IN, TO WAUKESHA, WI, VFR AT 10500 FT, OVER O'HARE'S AIRSPACE, SQUAWKING 1200 WITH MODE C TURNED ON, MY WIFE SPOTTED A TWIN ENG AIRLINER (ENGS MOUNTED ON WINGS) APCHING US FROM OUR L APPARENTLY CLBING OUT FROM O'HARE. ON INITIAL SIGHTING IT WAS ESTIMATED 1 MI AWAY AND APPEARED TO BE ON A COLLISION COURSE WITH US. I DSNDED SLIGHTLY AND IT PASSED DIRECTLY OVER US, ESTIMATED 300 FT ABOVE US. I DON'T BELIEVE THE OTHER PLTS SAW US AS THEY TOOK NO EVASIVE ACTION. I DO NOT UNDERSTAND HOW THIS HAPPENED AS IT IS MY UNDERSTANDING THAT GND CTLRS HAVE RADAR WHICH IDENTS US AS VFR TFC AND THEY KNOW OUR POS, SPD, DIRECTION OF FLT AND ALT. ALSO I BELIEVE MOST OR ALL AIRLINERS ARE TCASII EQUIPPED AND THEY HAVE THE SAME INFO IN THEIR COCKPIT. I'M NOT SURE WHAT THE MINIMUM SEPARATION REQUIREMENT IS IN THIS TYPE OF SIT (VFR) BUT THIS WAS TOO CLOSE FOR COMFORT. SUGGEST YOU REVIEW RADAR AND COM TAPES AND FIND OUT HOW IT HAPPENED.
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.