37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Attributes | |
ACN | 424966 |
Time | |
Date | 199901 |
Day | Mon |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | airport : ams |
State Reference | FO |
Altitude | msl bound lower : 2500 msl bound upper : 2800 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Operator | common carrier : air carrier |
Make Model Name | DC-10 Undifferentiated or Other Model |
Flight Phase | descent other |
Route In Use | arrival other enroute : on vectors |
Flight Plan | IFR |
Aircraft 2 | |
Operator | common carrier : air carrier |
Make Model Name | B747-400 |
Navigation In Use | Other |
Flight Phase | descent : approach |
Route In Use | approach : visual arrival other |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
ASRS Report | 424966 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : first officer |
Qualification | pilot : commercial |
Supplementary | |
Air Traffic Incident | Operational Error |
Narrative:
We were being vectored to an ILS runway 19R approach at ams. Heading was approximately 140 degrees tracking toward a point just north of the spl VOR when we were given a descent from 4500 ft to 2000 ft. During the descent and approximately 4 mi northwest of spl VOR, we were told to turn 'left to north' with a second call 'tighten up the turn to north.' during the turn we were told to stop the descent at 2500 ft, which was our altitude at the time. This maneuver placed us very close to the runway 19R localizer tracking at 2500 ft. We were given a turn to 335 degrees but before completing the turn we got an RA telling us to climb. At 2800 ft the conflict was clear. All clrncs were complied with in a timely manner and the expedited turn was at greater than standard rate. The rest of the approach was uneventful. The wind was very strong from the west. Our ground speed was approximately 350 KTS. The controller apparently was distraction and was late giving us a turn to downwind. But since we were previously cleared to 2000 ft, a late turn was bound to cause a conflict with aircraft on final or intercepting from the east. I suggest controllers delay descent until aircraft is established on downwind. Contributing factors: the events leading to the RA include: 1) extremely high winds from the west at low altitudes. We recall 65 KTS at 2500 ft MSL. We were assigned 220 KTS approaching spl. Our GS was nearly 300 KTS (low altitude). 2) we were descending from FL450 to 2000 ft assigned below 2000 ft until established on downwind leg. We were in visual contact with both conflicting aircraft. Collision was not even a factor.
Original NASA ASRS Text
Title: DC10 CREW HAD LESS THAN LEGAL SEPARATION WITH ACFT ON FINAL APCH COURSE.
Narrative: WE WERE BEING VECTORED TO AN ILS RWY 19R APCH AT AMS. HDG WAS APPROX 140 DEGS TRACKING TOWARD A POINT JUST N OF THE SPL VOR WHEN WE WERE GIVEN A DSCNT FROM 4500 FT TO 2000 FT. DURING THE DSCNT AND APPROX 4 MI NW OF SPL VOR, WE WERE TOLD TO TURN 'L TO N' WITH A SECOND CALL 'TIGHTEN UP THE TURN TO N.' DURING THE TURN WE WERE TOLD TO STOP THE DSCNT AT 2500 FT, WHICH WAS OUR ALT AT THE TIME. THIS MANEUVER PLACED US VERY CLOSE TO THE RWY 19R LOC TRACKING AT 2500 FT. WE WERE GIVEN A TURN TO 335 DEGS BUT BEFORE COMPLETING THE TURN WE GOT AN RA TELLING US TO CLB. AT 2800 FT THE CONFLICT WAS CLR. ALL CLRNCS WERE COMPLIED WITH IN A TIMELY MANNER AND THE EXPEDITED TURN WAS AT GREATER THAN STANDARD RATE. THE REST OF THE APCH WAS UNEVENTFUL. THE WIND WAS VERY STRONG FROM THE W. OUR GND SPD WAS APPROX 350 KTS. THE CTLR APPARENTLY WAS DISTR AND WAS LATE GIVING US A TURN TO DOWNWIND. BUT SINCE WE WERE PREVIOUSLY CLRED TO 2000 FT, A LATE TURN WAS BOUND TO CAUSE A CONFLICT WITH ACFT ON FINAL OR INTERCEPTING FROM THE E. I SUGGEST CTLRS DELAY DSCNT UNTIL ACFT IS ESTABLISHED ON DOWNWIND. CONTRIBUTING FACTORS: THE EVENTS LEADING TO THE RA INCLUDE: 1) EXTREMELY HIGH WINDS FROM THE W AT LOW ALTS. WE RECALL 65 KTS AT 2500 FT MSL. WE WERE ASSIGNED 220 KTS APCHING SPL. OUR GS WAS NEARLY 300 KTS (LOW ALT). 2) WE WERE DSNDING FROM FL450 TO 2000 FT ASSIGNED BELOW 2000 FT UNTIL ESTABLISHED ON DOWNWIND LEG. WE WERE IN VISUAL CONTACT WITH BOTH CONFLICTING ACFT. COLLISION WAS NOT EVEN A FACTOR.
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.