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Near midair collision between air carrier and corp-twin. See and avoid concept.
| Attributes | |
| ACN | 91832 |
| Time | |
| Date | 198808 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 11500 msl bound upper : 11500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zau |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 70 flight time total : 10500 flight time type : 4000 |
| ASRS Report | 91832 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 35 flight time total : 5000 |
| ASRS Report | 91960 |
| Events | |
| Anomaly | conflict : nmac non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 400 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
On climb out from O'hare, passing through 10500', ord departure handed us off to ZAU. We changed frequency and checked in with the center. He immediately called traffic at 12 O'clock, southbound, altitude unknown. We passed very close behind a light twin who was southbound at 11500'. We were now also passing through 11500'. We were eastbound at the time. I immediately leveled off and started a left turn to avoid collision. A possible contributing factor at the time is that the ARTS III radar system was inoperative at O'hare. We were squawking a nondiscrete code prior to the handoff. Callback conversation with reporter revealed the following: reporter says he mentioned near midair collision to center controller, but evidently did not make it clear that he wanted to file a formal near midair collision report, and no FAA personnel met him at destination to take report. Says he could easily read numbers on the other aircraft and revises miss distance to 400' or less. Controller in center said he was the target of aircraft Y and tried to get departure controller online to give traffic, but apparently departure controller changed air carrier to center frequency west/O getting that warning. Center gave traffic on first radio contact, but it was too late as aircraft were about to pass each other. Supplemental information from acn 91960: thought I was going to die--all over in 4 seconds. Saw vertical stabilizer from 50'. Our heading was 150 degrees. Air carrier X heading was 090 degrees proximity. He was climbing. Checked transponder before and after flight. Either controller blind or air carrier X captain did not worry about dying. We need to automate the system. Callback conversation with reporter revealed the following: there were 2 pilots aboard. Reporter has ATP rating. Closest point aircraft were about 50' apart. Reporter could clearly see facial features of air carrier PIC. Not in radio contact with any ATC facility. Had transponder with mode C operating. Level at 11500', which is correct altitude for direction of flight. Did not report near midair collision to any FAA facility.
Original NASA ASRS Text
Title: NMAC BETWEEN ACR AND CORP-TWIN. SEE AND AVOID CONCEPT.
Narrative: ON CLBOUT FROM O'HARE, PASSING THROUGH 10500', ORD DEP HANDED US OFF TO ZAU. WE CHANGED FREQ AND CHKED IN WITH THE CENTER. HE IMMEDIATELY CALLED TFC AT 12 O'CLOCK, SBND, ALT UNKNOWN. WE PASSED VERY CLOSE BEHIND A LIGHT TWIN WHO WAS SBND AT 11500'. WE WERE NOW ALSO PASSING THROUGH 11500'. WE WERE EBND AT THE TIME. I IMMEDIATELY LEVELED OFF AND STARTED A LEFT TURN TO AVOID COLLISION. A POSSIBLE CONTRIBUTING FACTOR AT THE TIME IS THAT THE ARTS III RADAR SYS WAS INOP AT O'HARE. WE WERE SQUAWKING A NONDISCRETE CODE PRIOR TO THE HDOF. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR SAYS HE MENTIONED NMAC TO CENTER CTLR, BUT EVIDENTLY DID NOT MAKE IT CLEAR THAT HE WANTED TO FILE A FORMAL NMAC RPT, AND NO FAA PERSONNEL MET HIM AT DEST TO TAKE RPT. SAYS HE COULD EASILY READ NUMBERS ON THE OTHER ACFT AND REVISES MISS DISTANCE TO 400' OR LESS. CTLR IN CENTER SAID HE WAS THE TARGET OF ACFT Y AND TRIED TO GET DEP CTLR ONLINE TO GIVE TFC, BUT APPARENTLY DEP CTLR CHANGED ACR TO CENTER FREQ W/O GETTING THAT WARNING. CENTER GAVE TFC ON FIRST RADIO CONTACT, BUT IT WAS TOO LATE AS ACFT WERE ABOUT TO PASS EACH OTHER. SUPPLEMENTAL INFO FROM ACN 91960: THOUGHT I WAS GOING TO DIE--ALL OVER IN 4 SECS. SAW VERT STABILIZER FROM 50'. OUR HDG WAS 150 DEGS. ACR X HDG WAS 090 DEGS PROX. HE WAS CLBING. CHKED TRANSPONDER BEFORE AND AFTER FLT. EITHER CTLR BLIND OR ACR X CAPT DID NOT WORRY ABOUT DYING. WE NEED TO AUTOMATE THE SYS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THERE WERE 2 PLTS ABOARD. RPTR HAS ATP RATING. CLOSEST POINT ACFT WERE ABOUT 50' APART. RPTR COULD CLEARLY SEE FACIAL FEATURES OF ACR PIC. NOT IN RADIO CONTACT WITH ANY ATC FAC. HAD TRANSPONDER WITH MODE C OPERATING. LEVEL AT 11500', WHICH IS CORRECT ALT FOR DIRECTION OF FLT. DID NOT REPORT NMAC TO ANY FAA FAC.
Data retrieved from NASA's ASRS site as of August 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.