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A B757 crew experiences a potential conflict during descent towards initial approach altitude with unseen crossing traffic 20 mi east of fll, fl.
| Attributes | |
| ACN | 530320 |
| Time | |
| Date | 200111 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : fll.airport |
| State Reference | FL |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mia.tracon tower : fll.tower artcc : eggx.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Flight Phase | descent : intermediate altitude |
| Aircraft 2 | |
| Controlling Facilities | tracon : mia.tracon |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 530320 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 12000 vertical : 800 |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance Environmental Factor ATC Human Performance Airspace Structure |
| Primary Problem | Flight Crew Human Performance |
Narrative:
On arrival to fll in B757, we were cleared to descend from 5000 ft to 2000 ft on 300 degree heading toccc intercept localizer runway 27R. Approach control called out VFR traffic 1 O'clock position, 5 mi. I responded that we were in the clouds. Tops were approximately 3100 ft and this VFR traffic caused a TA on TCASII. At approximately 2600-2700 ft, the captain executed a vertical maneuver to avoid crossing through altitude of said VFR traffic. ATC again called traffic at 1 mi. We never saw the VFR traffic due to WX. The climb we executed was approximately 400-500 ft to top of cloud deck. By that point VFR traffic was behind us. No RA was given by TCASII however we were expecting one at any moment. Both pilots were concerned with proximity to unseen VFR traffic while in a solid cloud deck. Incident was reported to ATC and approach was completed uneventfully. Base of clouds was 2000 ft.
Original NASA ASRS Text
Title: A B757 CREW EXPERIENCES A POTENTIAL CONFLICT DURING DSCNT TOWARDS INITIAL APCH ALT WITH UNSEEN XING TFC 20 MI E OF FLL, FL.
Narrative: ON ARR TO FLL IN B757, WE WERE CLRED TO DSND FROM 5000 FT TO 2000 FT ON 300 DEG HDG TOCCC INTERCEPT LOC RWY 27R. APCH CTL CALLED OUT VFR TFC 1 O'CLOCK POS, 5 MI. I RESPONDED THAT WE WERE IN THE CLOUDS. TOPS WERE APPROX 3100 FT AND THIS VFR TFC CAUSED A TA ON TCASII. AT APPROX 2600-2700 FT, THE CAPT EXECUTED A VERT MANEUVER TO AVOID XING THROUGH ALT OF SAID VFR TFC. ATC AGAIN CALLED TFC AT 1 MI. WE NEVER SAW THE VFR TFC DUE TO WX. THE CLB WE EXECUTED WAS APPROX 400-500 FT TO TOP OF CLOUD DECK. BY THAT POINT VFR TFC WAS BEHIND US. NO RA WAS GIVEN BY TCASII HOWEVER WE WERE EXPECTING ONE AT ANY MOMENT. BOTH PLTS WERE CONCERNED WITH PROX TO UNSEEN VFR TFC WHILE IN A SOLID CLOUD DECK. INCIDENT WAS RPTED TO ATC AND APCH WAS COMPLETED UNEVENTFULLY. BASE OF CLOUDS WAS 2000 FT.
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.