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Close proximity air carrier-large transport GA-small aircraft. Air carrier was in descent toward ord, GA probably in VFR cruise on crossing airway.
| Attributes | |
| ACN | 87710 |
| Time | |
| Date | 198805 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 8500 msl bound upper : 8700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute : direct enroute airway : v100 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 11000 flight time type : 2000 |
| ASRS Report | 87710 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 210 flight time total : 1700 flight time type : 1200 |
| ASRS Report | 87866 |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Captain sighted traffic 11 O'clock left to right (first officer flying). Captain made immediate evasive action to left, avoiding unpleasantness. Small aircraft, white/red strip probably 8500' +/- over TCA. Legal situation straining the see and avoid concept. Supplemental information from acn 87866: at approximately 8800' MSL captain called 'break left' in a calm tone. I was watching out right side of aircraft and first officer was flying and watching right also. Captain then said 'turn right now' and took control and banked left 20-25 degree of bank. The captain was the only ex-military pilot on the crew, so 'break left' had no meaning for us and he said it so calmly that he did not immediately draw our attention.
Original NASA ASRS Text
Title: CLOSE PROX ACR-LGT GA-SMA. ACR WAS IN DESCENT TOWARD ORD, GA PROBABLY IN VFR CRUISE ON CROSSING AIRWAY.
Narrative: CAPT SIGHTED TFC 11 O'CLOCK LEFT TO RIGHT (F/O FLYING). CAPT MADE IMMEDIATE EVASIVE ACTION TO LEFT, AVOIDING UNPLEASANTNESS. SMA, WHITE/RED STRIP PROBABLY 8500' +/- OVER TCA. LEGAL SITUATION STRAINING THE SEE AND AVOID CONCEPT. SUPPLEMENTAL INFO FROM ACN 87866: AT APPROX 8800' MSL CAPT CALLED 'BREAK LEFT' IN A CALM TONE. I WAS WATCHING OUT RIGHT SIDE OF ACFT AND F/O WAS FLYING AND WATCHING RIGHT ALSO. CAPT THEN SAID 'TURN RIGHT NOW' AND TOOK CONTROL AND BANKED LEFT 20-25 DEG OF BANK. THE CAPT WAS THE ONLY EX-MIL PLT ON THE CREW, SO 'BREAK LEFT' HAD NO MEANING FOR US AND HE SAID IT SO CALMLY THAT HE DID NOT IMMEDIATELY DRAW OUR ATTN.
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.