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|
Attributes | |
ACN | 381951 |
Time | |
Date | 199710 |
Day | Fri |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | airport : scl |
State Reference | FO |
Altitude | msl bound lower : 6000 msl bound upper : 6000 |
Aircraft 1 | |
Controlling Facilities | tracon : scl |
Operator | common carrier : air carrier |
Make Model Name | B767 Undifferentiated or Other Model |
Operating Under FAR Part | Part 121 |
Navigation In Use | Other Other |
Flight Phase | descent : approach |
Route In Use | enroute airway : scl |
Flight Plan | IFR |
Aircraft 2 | |
Operator | common carrier : air carrier |
Make Model Name | Commercial Fixed Wing |
Operating Under FAR Part | Part 121 |
Flight Phase | descent : approach |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Qualification | pilot : atp |
ASRS Report | 381951 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : first officer |
Qualification | pilot : instrument pilot : commercial |
ASRS Report | 382224 |
Events | |
Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : published procedure other anomaly other |
Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
Resolutory Action | flight crew : returned to intended course or assigned course |
Consequence | Other |
Supplementary | |
Primary Problem | ATC Human Performance |
Air Traffic Incident | other |
Situations | |
ATC Facility | procedure or policy : unspecified |
Narrative:
Received runway change close in to VOR DME runway 35. Cleared to descend to 6000 ft. Cleared VOR DME runway 35 approach, descend at pilot's discretion. We were given no indication of traffic ahead on the approach. Received TA just prior to 10 DME outbound for course reversal and broke out of clouds at 6000 ft. Had traffic in sight at 12 O'clock, started turn to right, noted 900 ft on TCASII -- aircraft going below us as we were turning and began descent to 5000 ft. On ground, air carrier X called and asked if we had seen him on the approach and that he had received a TCASII alert. We determined that air carrier X was late in descending to 4500 ft per the approach and that our descent rate must have triggered the TA. We never received an RA. We were flying the procedure as shown -- at above 6000 ft at 10 DME -- when we continued the descent to 5000 ft entering the outbound turn to be at 5000 ft at 14 DME. The rest of the approach was normal. The flight was never in jeopardy, however, we could see how this could be potential future problem, ie, 2 aircraft at same altitude in the holding pattern/procedure turn in this situation.
Original NASA ASRS Text
Title: B767 FLC CLRED TO DSND AND CLRED FOR APCH RECEIVED TCASII TA ON ACFT WHICH THEY SEE AFTER BREAKING OUT OF CLOUDS. THE OTHER ACFT'S FLC CONTACTED RPTR ON GND BECAUSE THEY TOO HAD A TCASII TA. APPARENTLY THEY DSNDED LATE, BUT CTLR DIDN'T SAY ANYTHING.
Narrative: RECEIVED RWY CHANGE CLOSE IN TO VOR DME RWY 35. CLRED TO DSND TO 6000 FT. CLRED VOR DME RWY 35 APCH, DSND AT PLT'S DISCRETION. WE WERE GIVEN NO INDICATION OF TFC AHEAD ON THE APCH. RECEIVED TA JUST PRIOR TO 10 DME OUTBOUND FOR COURSE REVERSAL AND BROKE OUT OF CLOUDS AT 6000 FT. HAD TFC IN SIGHT AT 12 O'CLOCK, STARTED TURN TO R, NOTED 900 FT ON TCASII -- ACFT GOING BELOW US AS WE WERE TURNING AND BEGAN DSCNT TO 5000 FT. ON GND, ACR X CALLED AND ASKED IF WE HAD SEEN HIM ON THE APCH AND THAT HE HAD RECEIVED A TCASII ALERT. WE DETERMINED THAT ACR X WAS LATE IN DSNDING TO 4500 FT PER THE APCH AND THAT OUR DSCNT RATE MUST HAVE TRIGGERED THE TA. WE NEVER RECEIVED AN RA. WE WERE FLYING THE PROC AS SHOWN -- AT ABOVE 6000 FT AT 10 DME -- WHEN WE CONTINUED THE DSCNT TO 5000 FT ENTERING THE OUTBOUND TURN TO BE AT 5000 FT AT 14 DME. THE REST OF THE APCH WAS NORMAL. THE FLT WAS NEVER IN JEOPARDY, HOWEVER, WE COULD SEE HOW THIS COULD BE POTENTIAL FUTURE PROB, IE, 2 ACFT AT SAME ALT IN THE HOLDING PATTERN/PROC TURN IN THIS SIT.
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.