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Small aircraft pilot requested VFR traffic advisories and then didn't monitor frequency nor adhere to suggested altitudes, result was near midair collision with IFR small transport.
| Attributes | |
| ACN | 100789 |
| Time | |
| Date | 198812 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mke |
| State Reference | WI |
| Altitude | msl bound lower : 10000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mke tower : iah |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : mke |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Retractable Gear |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 100789 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 300 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
About XA20Z, while working ear/dr combined, I was giving VFR advisories to small aircraft Y. VFR racine, wi, to jackson, mi. Small aircraft Y wanted to climb to 11500'. I suggested he climb to 10500' account traffic eastbound at 11000'. About 5 mins later I noticed an overflt wbound at 10000'. I told small aircraft Y to stop climb at 9500', that traffic was 12 mi east of him wbound at 1000'. Small aircraft Y did not acknowledge. I then coordinated with chicago center reference traffic in the vicinity of bravo intersection. Then again I told small aircraft Y to maintain VFR at 9500', that traffic was 6 mi from him and again he did not acknowledge. Small transport X wbound at 10000' made his initial contact with me and said he just had a near miss. I believe the situation occurred because small aircraft Y was not paying attention. As soon as small transport X said he had a near miss, I asked small aircraft Y if he heard me, and he did. To prevent recurrence perhaps the pilot of small aircraft Y could be talked to.
Original NASA ASRS Text
Title: SMA PLT REQUESTED VFR TRAFFIC ADVISORIES AND THEN DIDN'T MONITOR FREQ NOR ADHERE TO SUGGESTED ALTS, RESULT WAS NMAC WITH IFR SMT.
Narrative: ABOUT XA20Z, WHILE WORKING EAR/DR COMBINED, I WAS GIVING VFR ADVISORIES TO SMA Y. VFR RACINE, WI, TO JACKSON, MI. SMA Y WANTED TO CLB TO 11500'. I SUGGESTED HE CLB TO 10500' ACCOUNT TFC EBND AT 11000'. ABOUT 5 MINS LATER I NOTICED AN OVERFLT WBOUND AT 10000'. I TOLD SMA Y TO STOP CLB AT 9500', THAT TFC WAS 12 MI E OF HIM WBOUND AT 1000'. SMA Y DID NOT ACKNOWLEDGE. I THEN COORDINATED WITH CHICAGO CENTER REF TFC IN THE VICINITY OF BRAVO INTXN. THEN AGAIN I TOLD SMA Y TO MAINTAIN VFR AT 9500', THAT TFC WAS 6 MI FROM HIM AND AGAIN HE DID NOT ACKNOWLEDGE. SMT X WBOUND AT 10000' MADE HIS INITIAL CONTACT WITH ME AND SAID HE JUST HAD A NEAR MISS. I BELIEVE THE SITUATION OCCURRED BECAUSE SMA Y WAS NOT PAYING ATTN. AS SOON AS SMT X SAID HE HAD A NEAR MISS, I ASKED SMA Y IF HE HEARD ME, AND HE DID. TO PREVENT RECURRENCE PERHAPS THE PLT OF SMA Y COULD BE TALKED TO.
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.