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While level at an approach transition altitude, the captain of a BAE125, HS25, climbed in response to a TCASII RA and subsequently observed a C150 pass beneath off to the side.
| Attributes | |
| ACN | 429598 |
| Time | |
| Date | 199903 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl bound lower : 4000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon tower : apa |
| Operator | general aviation : corporate |
| Make Model Name | HS 125 Series 700 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : c90.tracon |
| Make Model Name | Cessna 150 |
| Operating Under FAR Part | Part 91 |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : instrument pilot : multi engine pilot : atp |
| Experience | flight time last 90 days : 59 flight time total : 14000 flight time type : 300 |
| ASRS Report | 429598 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 3000 vertical : 800 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Was with ord approach at approximately XA00Z when a TA illuminated, followed by an immediate RA. I was at 4500 ft assigned. In order to comply with the RA, we executed an abrupt climb, leveling at 5000 ft MSL. The intruder aircraft was a C150 or C152 that passed below our flight path. The aircraft was close enough to make out the paint scheme. ATC was advised by first officer that we had an RA and were climbing. Upon reaching 5000 ft, ATC advised he had just picked him up (target) when we announced our climb. No further incident occurred.
Original NASA ASRS Text
Title: WHILE LEVEL AT AN APCH TRANSITION ALT, THE CAPT OF A BAE125, HS25, CLBED IN RESPONSE TO A TCASII RA AND SUBSEQUENTLY OBSERVED A C150 PASS BENEATH OFF TO THE SIDE.
Narrative: WAS WITH ORD APCH AT APPROX XA00Z WHEN A TA ILLUMINATED, FOLLOWED BY AN IMMEDIATE RA. I WAS AT 4500 FT ASSIGNED. IN ORDER TO COMPLY WITH THE RA, WE EXECUTED AN ABRUPT CLB, LEVELING AT 5000 FT MSL. THE INTRUDER ACFT WAS A C150 OR C152 THAT PASSED BELOW OUR FLT PATH. THE ACFT WAS CLOSE ENOUGH TO MAKE OUT THE PAINT SCHEME. ATC WAS ADVISED BY FO THAT WE HAD AN RA AND WERE CLBING. UPON REACHING 5000 FT, ATC ADVISED HE HAD JUST PICKED HIM UP (TARGET) WHEN WE ANNOUNCED OUR CLB. NO FURTHER INCIDENT OCCURRED.
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.