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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Approach controller vectoring aircraft for handoff to final, controller forgot to descend an HS25 to the required altitude of 9000 ft and took him through a C208 altitude of 10000 ft with less than standard separation. In vectoring for vertical separation he allowed the HS25 to slop over the ILS final approach and lost horizontal separation also.
| Attributes | |
| ACN | 356945 |
| Time | |
| Date | 199701 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | msl bound lower : 8000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : slc |
| Operator | general aviation : personal |
| Make Model Name | HS 125 Series 1-600 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air taxi |
| Make Model Name | Caravan 1 208A |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 10 |
| ASRS Report | 356945 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Extremely busy after a runway change. Had a broad mix of different type aircraft in downwind and forced to use many different altitudes to keep from overtaking slower with faster. I was stepping the jets down over the propellers. Our procedures require my position to be at 9000 ft before turning base leg. Other final turns at 10000 ft. I thought I had taken the HS25 to 9000 ft, but he was still at 10000 ft when I turned him towards the final. Once I noticed this, I descended the HS25 to 8000 ft and asked him to hurry. The C208 was on final at 10000 ft. I managed to get the HS25 about 700 ft below the C208 at turn-on. The HS25 went slightly through the ILS and I corrected him back. Once he was established, separation was achieved.
Original NASA ASRS Text
Title: APCH CTLR VECTORING ACFT FOR HDOF TO FINAL, CTLR FORGOT TO DSND AN HS25 TO THE REQUIRED ALT OF 9000 FT AND TOOK HIM THROUGH A C208 ALT OF 10000 FT WITH LTSS. IN VECTORING FOR VERT SEPARATION HE ALLOWED THE HS25 TO SLOP OVER THE ILS FINAL APCH AND LOST HORIZ SEPARATION ALSO.
Narrative: EXTREMELY BUSY AFTER A RWY CHANGE. HAD A BROAD MIX OF DIFFERENT TYPE ACFT IN DOWNWIND AND FORCED TO USE MANY DIFFERENT ALTS TO KEEP FROM OVERTAKING SLOWER WITH FASTER. I WAS STEPPING THE JETS DOWN OVER THE PROPS. OUR PROCS REQUIRE MY POS TO BE AT 9000 FT BEFORE TURNING BASE LEG. OTHER FINAL TURNS AT 10000 FT. I THOUGHT I HAD TAKEN THE HS25 TO 9000 FT, BUT HE WAS STILL AT 10000 FT WHEN I TURNED HIM TOWARDS THE FINAL. ONCE I NOTICED THIS, I DSNDED THE HS25 TO 8000 FT AND ASKED HIM TO HURRY. THE C208 WAS ON FINAL AT 10000 FT. I MANAGED TO GET THE HS25 ABOUT 700 FT BELOW THE C208 AT TURN-ON. THE HS25 WENT SLIGHTLY THROUGH THE ILS AND I CORRECTED HIM BACK. ONCE HE WAS ESTABLISHED, SEPARATION WAS ACHIEVED.
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.