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ATC reporter claims that the ASOS visibility was less than tower prevailing visibility and caused an light transport commuter to not execute the approach.
| Attributes | |
| ACN | 329754 |
| Time | |
| Date | 199603 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pia |
| State Reference | IL |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | landing other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach landing other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller non radar : 14 controller radar : 7 |
| ASRS Report | 329754 |
| Person 2 | |
| Affiliation | Other |
| Function | oversight : pic |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | other anomaly other other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Mar/xx/96. About XX30 pm, peoria, il, another ASOS event. We had a terrible winter storm. Low visibility and freezing rain and snow. A kingair-X just landed on runway 31 and reported the braking action as 'poor to nil.' an air carrier Y, SF34, was being vectored for an ILS/DME runway 4 approach. A new WX report comes out, says the visibility is 1/2 mi (the minimum for the approach is 3/4 mi). Air carrier Y cannot shoot the approach because of visibility. We could see 3/4 mi from the tower. About 30 mins later an air carrier Z completed an ILS runway 31 and said he saw the airport 5 mi out. Air carrier Y flew an additional 25 mi in freezing rain because of another inaccurate ASOS WX report.
Original NASA ASRS Text
Title: ATC RPTR CLAIMS THAT THE ASOS VISIBILITY WAS LESS THAN TWR PREVAILING VISIBILITY AND CAUSED AN LTT COMMUTER TO NOT EXECUTE THE APCH.
Narrative: MAR/XX/96. ABOUT XX30 PM, PEORIA, IL, ANOTHER ASOS EVENT. WE HAD A TERRIBLE WINTER STORM. LOW VISIBILITY AND FREEZING RAIN AND SNOW. A KINGAIR-X JUST LANDED ON RWY 31 AND RPTED THE BRAKING ACTION AS 'POOR TO NIL.' AN ACR Y, SF34, WAS BEING VECTORED FOR AN ILS/DME RWY 4 APCH. A NEW WX RPT COMES OUT, SAYS THE VISIBILITY IS 1/2 MI (THE MINIMUM FOR THE APCH IS 3/4 MI). ACR Y CANNOT SHOOT THE APCH BECAUSE OF VISIBILITY. WE COULD SEE 3/4 MI FROM THE TWR. ABOUT 30 MINS LATER AN ACR Z COMPLETED AN ILS RWY 31 AND SAID HE SAW THE ARPT 5 MI OUT. ACR Y FLEW AN ADDITIONAL 25 MI IN FREEZING RAIN BECAUSE OF ANOTHER INACCURATE ASOS WX RPT.
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.