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Flight crew of medium large transport cleared for visual to follow traffic misidentified traffic and had traffic conflict with closer traffic.
| Attributes | |
| ACN | 180335 |
| Time | |
| Date | 199106 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : iah |
| State Reference | TX |
| Altitude | msl bound lower : 3000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iah tower : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude descent : approach |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10800 flight time type : 1900 |
| ASRS Report | 180335 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 1000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
Cleared visibility approach behind widebody transport jet, 1 O'clock from our position. First officer flying aircraft. We both looked to 1 O'clock and picked up what we thought to be widebody transport at 5 mi. Also 1 O'clock on TCAS. As we turned in on base about 45 seconds later to follow, I looked back to ensure our belly was clear and saw another aircraft, co-altitude and about 3 mi on collision course. As we started evasive action (climb), approach called to climb immediately to 4000', so we did. TCAS did give RA during climb. We passed directly over widebody transport. Controller had lost bubble earlier. I guess when he called the 1 O'clock traffic he meant the 12:30 traffic, which was not on TCAS in 10 mi scale. All we had on both TCAS and visibility was (we found later) an large transport.
Original NASA ASRS Text
Title: FLT CREW OF MLG CLEARED FOR VISUAL TO FOLLOW TRAFFIC MISIDENTIFIED TRAFFIC AND HAD TRAFFIC CONFLICT WITH CLOSER TRAFFIC.
Narrative: CLRED VIS APCH BEHIND WDB JET, 1 O'CLOCK FROM OUR POS. F/O FLYING ACFT. WE BOTH LOOKED TO 1 O'CLOCK AND PICKED UP WHAT WE THOUGHT TO BE WDB AT 5 MI. ALSO 1 O'CLOCK ON TCAS. AS WE TURNED IN ON BASE ABOUT 45 SECS LATER TO FOLLOW, I LOOKED BACK TO ENSURE OUR BELLY WAS CLR AND SAW ANOTHER ACFT, CO-ALT AND ABOUT 3 MI ON COLLISION COURSE. AS WE STARTED EVASIVE ACTION (CLB), APCH CALLED TO CLB IMMEDIATELY TO 4000', SO WE DID. TCAS DID GIVE RA DURING CLB. WE PASSED DIRECTLY OVER WDB. CTLR HAD LOST BUBBLE EARLIER. I GUESS WHEN HE CALLED THE 1 O'CLOCK TFC HE MEANT THE 12:30 TFC, WHICH WAS NOT ON TCAS IN 10 MI SCALE. ALL WE HAD ON BOTH TCAS AND VIS WAS (WE FOUND LATER) AN LGT.
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.