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Controller vectoring aircraft for arrival sequence had less than standard separation between an small transport and an small aircraft. Controller working combined position.
| Attributes | |
| ACN | 84619 |
| Time | |
| Date | 198803 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : azo |
| State Reference | MI |
| Altitude | msl bound lower : 2800 msl bound upper : 2800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : azo |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 85619 |
| Person 2 | |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working combined radar at about XA45Z. I had 4 inbnds to kalamazoo, 2 were flts and 1 departure. I had small transport X as #1 and he said he was too high, so I gave him a left turn to a heading of 090 degrees. I then stopped his turn on a 130 degree heading. I had small aircraft Y east of the final about 4 mi heading 270 degrees. I saw it was going to be close, so when small transport X was about 2-2 1/2 mi west of the final, I turned him to a 010 degree heading to intercept the final and turned small aircraft Y left to a heading of 180 degrees. Because I knew it was going to be close, I told both pilots to give me tight turns several times. The pilot of small transport X told me he was turning at a 30 degree bank and I saw that small aircraft Y was heading 180 degrees, and it appeared that the courses were diverging. I thanked both pilots for the tight turns.
Original NASA ASRS Text
Title: CTLR VECTORING ACFT FOR ARR SEQUENCE HAD LESS THAN STANDARD SEPARATION BETWEEN AN SMT AND AN SMA. CTLR WORKING COMBINED POSITION.
Narrative: I WAS WORKING COMBINED RADAR AT ABOUT XA45Z. I HAD 4 INBNDS TO KALAMAZOO, 2 WERE FLTS AND 1 DEP. I HAD SMT X AS #1 AND HE SAID HE WAS TOO HIGH, SO I GAVE HIM A LEFT TURN TO A HDG OF 090 DEGS. I THEN STOPPED HIS TURN ON A 130 DEG HDG. I HAD SMA Y E OF THE FINAL ABOUT 4 MI HDG 270 DEGS. I SAW IT WAS GOING TO BE CLOSE, SO WHEN SMT X WAS ABOUT 2-2 1/2 MI W OF THE FINAL, I TURNED HIM TO A 010 DEG HDG TO INTERCEPT THE FINAL AND TURNED SMA Y LEFT TO A HDG OF 180 DEGS. BECAUSE I KNEW IT WAS GOING TO BE CLOSE, I TOLD BOTH PLTS TO GIVE ME TIGHT TURNS SEVERAL TIMES. THE PLT OF SMT X TOLD ME HE WAS TURNING AT A 30 DEG BANK AND I SAW THAT SMA Y WAS HDG 180 DEGS, AND IT APPEARED THAT THE COURSES WERE DIVERGING. I THANKED BOTH PLTS FOR THE TIGHT TURNS.
Data retrieved from NASA's ASRS site as of August 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.