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Flight crew of a B737-200 stopped ILS approach and climbed in response to a TCASII RA. No traffic observed and tower showed no other conflicting traffic.
| Attributes | |
| ACN | 478039 |
| Time | |
| Date | 200007 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mdw.airport |
| State Reference | IL |
| Altitude | agl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mdw.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 31c |
| Flight Phase | descent : approach landing : missed approach |
| Route In Use | approach : circling approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : mdw.tower |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 6000 flight time type : 900 |
| ASRS Report | 478039 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 230 flight time total : 15000 flight time type : 2000 |
| ASRS Report | 478040 |
| Events | |
| Anomaly | aircraft equipment problem : less severe conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On VMC ILS runway 31C circle-to-land runway 22L at mdw, approximately 2 mi final, a target showed on TCASII at our altitude and approximately 1 mi away. RA called for climb. We climbed, saw no traffic. Advised ATC suspected a false target. ATC had no reported traffic after RA. Continued normal operations.
Original NASA ASRS Text
Title: FLC OF A B737-200 STOPPED ILS APCH AND CLBED IN RESPONSE TO A TCASII RA. NO TFC OBSERVED AND TWR SHOWED NO OTHER CONFLICTING TFC.
Narrative: ON VMC ILS RWY 31C CIRCLE-TO-LAND RWY 22L AT MDW, APPROX 2 MI FINAL, A TARGET SHOWED ON TCASII AT OUR ALT AND APPROX 1 MI AWAY. RA CALLED FOR CLB. WE CLBED, SAW NO TFC. ADVISED ATC SUSPECTED A FALSE TARGET. ATC HAD NO RPTED TFC AFTER RA. CONTINUED NORMAL OPS.
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.