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B737-400 flight crew stopped their visual descent early to assigned altitude due to a TCASII alert. After traffic cleared, approach controller cleared them for a visual approach.
| Attributes | |
| ACN | 536076 |
| Time | |
| Date | 200201 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : fll.airport |
| State Reference | FL |
| Altitude | msl single value : 3600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia.tracon tower : cha.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 9l other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| 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 : 19578 flight time type : 8599 |
| ASRS Report | 536076 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Being vectored for runway 9L ILS at fll at 4000 ft MSL, about 17 NM on downwind. Approach gave us a turn to 180 degrees and look for traffic. I was instructing student first officer on the FMC when he stated we were cleared to 3000 ft MSL and started down. At about 3600 ft MSL, TCASII alerted to stop descent. Stopped descent and traffic disappeared. Approach asked if we had airport in sight and cleared us for visual approach runway 9L. Nothing further was said from approach and we landed normally. While I was distraction in my teaching, I could not in my own mind verify the clearance to 3000 ft. Traffic was a pop-up, nothing we were showing prior to TCASII alert. First officer was positive clearance to 3000 ft MSL was received. Task saturation teaching, explaining FMC approach procedures, and looking for the jet we were to follow at 2 O'clock position diverted my attention.
Original NASA ASRS Text
Title: B737-400 FLC STOPPED THEIR VISUAL DSCNT EARLY TO ASSIGNED ALT DUE TO A TCASII ALERT. AFTER TFC CLRED, APCH CTLR CLRED THEM FOR A VISUAL APCH.
Narrative: BEING VECTORED FOR RWY 9L ILS AT FLL AT 4000 FT MSL, ABOUT 17 NM ON DOWNWIND. APCH GAVE US A TURN TO 180 DEGS AND LOOK FOR TFC. I WAS INSTRUCTING STUDENT FO ON THE FMC WHEN HE STATED WE WERE CLRED TO 3000 FT MSL AND STARTED DOWN. AT ABOUT 3600 FT MSL, TCASII ALERTED TO STOP DSCNT. STOPPED DSCNT AND TFC DISAPPEARED. APCH ASKED IF WE HAD ARPT IN SIGHT AND CLRED US FOR VISUAL APCH RWY 9L. NOTHING FURTHER WAS SAID FROM APCH AND WE LANDED NORMALLY. WHILE I WAS DISTR IN MY TEACHING, I COULD NOT IN MY OWN MIND VERIFY THE CLRNC TO 3000 FT. TFC WAS A POP-UP, NOTHING WE WERE SHOWING PRIOR TO TCASII ALERT. FO WAS POSITIVE CLRNC TO 3000 FT MSL WAS RECEIVED. TASK SATURATION TEACHING, EXPLAINING FMC APCH PROCS, AND LOOKING FOR THE JET WE WERE TO FOLLOW AT 2 O'CLOCK POS DIVERTED MY ATTN.
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.