Private pilot on IFR approach in IMC to eau was unable to communicate with snow plows on the runway.

Attributes
ACN	501597
Time
Date	200102
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : eau.airport
State Reference	WI
Altitude	agl single value : 300
Environment
Flight Conditions	IMC
Weather Elements	Snow
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp.artcc
Operator	general aviation : personal
Make Model Name	PA-23-250 Aztec
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 22
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 30 flight time total : 1100 flight time type : 160
ASRS Report	501597
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : ground less severe
Independent Detector	other flight crewa
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

The advisory frequency of 123.6 is not published on the terminal procedures for eau and is only available by NOTAM even though it evidently has been in use for over 6 months. Eau was my alternate on a low ceiling, low visibility day. I had checked the WX report for eau with green bay FSS, listened to ASOS, and was in communication with ZMP. At no time was I notified of 123.6 as the local advisory frequency. I used 122.95 as published in terminal procedures. The result was I had no pilot controled lighting on a very low approach and the snow plows evidently couldn't hear me on 122.95. I think an alert controller at ZMP notified the plows I was incoming. Why isn't the correct frequency on the approach plates 6 months after a change?

Original NASA ASRS Text

Title: PVT PLT ON IFR APCH IN IMC TO EAU WAS UNABLE TO COMMUNICATE WITH SNOW PLOWS ON THE RWY.

Narrative: THE ADVISORY FREQ OF 123.6 IS NOT PUBLISHED ON THE TERMINAL PROCS FOR EAU AND IS ONLY AVAILABLE BY NOTAM EVEN THOUGH IT EVIDENTLY HAS BEEN IN USE FOR OVER 6 MONTHS. EAU WAS MY ALTERNATE ON A LOW CEILING, LOW VISIBILITY DAY. I HAD CHKED THE WX RPT FOR EAU WITH GREEN BAY FSS, LISTENED TO ASOS, AND WAS IN COM WITH ZMP. AT NO TIME WAS I NOTIFIED OF 123.6 AS THE LCL ADVISORY FREQ. I USED 122.95 AS PUBLISHED IN TERMINAL PROCS. THE RESULT WAS I HAD NO PLT CTLED LIGHTING ON A VERY LOW APCH AND THE SNOW PLOWS EVIDENTLY COULDN'T HEAR ME ON 122.95. I THINK AN ALERT CTLR AT ZMP NOTIFIED THE PLOWS I WAS INCOMING. WHY ISN'T THE CORRECT FREQ ON THE APCH PLATES 6 MONTHS AFTER A CHANGE?

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.