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Near midair collision between a B767-300 on visual approach at 3500 ft and a single engine cessna 500 ft below crossing through their flight path on a converging course. Reporter began a climb until a visual sighting of the actual traffic causing the TCASII resolution appeared clear.
| Attributes | |
| ACN | 391247 |
| Time | |
| Date | 199712 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 3500 msl bound upper : 3500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : atl |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Cessna Single Piston Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 391247 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
On visual approach to runway 27L at the hartsfield atlanta airport on a 10 mi final at 3500 ft a TCASII TA was observed for traffic at 2 O'clock same altitude (3500 ft) less than 1/2 mi. B727 aircraft was observed at 2 O'clock on final approach to runway 26R but at least 500 ft above our altitude. When I looked at TCASII display again target turned red and a climb RA was given by TCASII. I started climb and visually acquired a C152/172 at mid-field extended centerline between runways 27R and 26L at our altitude headed southeast at approximately 3000 ft horizontal distance headed towards us. Aircraft passed underneath us 500 ft below us. Lesson I learned was that had we assumed the TA was for the B727 we may have ignored the TCASII climb RA and possibly hit the C152/172. I would urge any pilot who believes that they have acquired an aircraft visually after a TCASII advisory and still gets an RA to climb or descend, that it should be followed in case there is another aircraft out there that they can't see.
Original NASA ASRS Text
Title: NMAC BTWN A B767-300 ON VISUAL APCH AT 3500 FT AND A SINGLE ENG CESSNA 500 FT BELOW XING THROUGH THEIR FLT PATH ON A CONVERGING COURSE. RPTR BEGAN A CLB UNTIL A VISUAL SIGHTING OF THE ACTUAL TFC CAUSING THE TCASII RESOLUTION APPEARED CLR.
Narrative: ON VISUAL APCH TO RWY 27L AT THE HARTSFIELD ATLANTA ARPT ON A 10 MI FINAL AT 3500 FT A TCASII TA WAS OBSERVED FOR TFC AT 2 O'CLOCK SAME ALT (3500 FT) LESS THAN 1/2 MI. B727 ACFT WAS OBSERVED AT 2 O'CLOCK ON FINAL APCH TO RWY 26R BUT AT LEAST 500 FT ABOVE OUR ALT. WHEN I LOOKED AT TCASII DISPLAY AGAIN TARGET TURNED RED AND A CLB RA WAS GIVEN BY TCASII. I STARTED CLB AND VISUALLY ACQUIRED A C152/172 AT MID-FIELD EXTENDED CTRLINE BTWN RWYS 27R AND 26L AT OUR ALT HEADED SE AT APPROX 3000 FT HORIZ DISTANCE HEADED TOWARDS US. ACFT PASSED UNDERNEATH US 500 FT BELOW US. LESSON I LEARNED WAS THAT HAD WE ASSUMED THE TA WAS FOR THE B727 WE MAY HAVE IGNORED THE TCASII CLB RA AND POSSIBLY HIT THE C152/172. I WOULD URGE ANY PLT WHO BELIEVES THAT THEY HAVE ACQUIRED AN ACFT VISUALLY AFTER A TCASII ADVISORY AND STILL GETS AN RA TO CLB OR DSND, THAT IT SHOULD BE FOLLOWED IN CASE THERE IS ANOTHER ACFT OUT THERE THAT THEY CAN'T SEE.
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.