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Reporter advises that because both automated WX stations broadcast on the same frequency and the abr transmitter seems the stronger of the two, the ASOS at abr overpowers AWOS at dvl thus making user receipt of WX for dvl difficult and sometimes impossible. Aircraft report the need to be within 20 NM of dvl before their WX information can be copied clearly.
| Attributes | |
| ACN | 587511 |
| Time | |
| Date | 200307 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| State Reference | ND |
| Altitude | msl single value : 18000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Fog |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp.artcc |
| Operator | general aviation : corporate |
| Make Model Name | PA-31T Cheyenne II |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Experience | controller military : 4 controller supervisory : 11 controller time certified in position1 : 26 |
| ASRS Report | 587511 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | FAA Weather Environmental Factor ATC Facility |
| Primary Problem | FAA |
Narrative:
A flight en route far to dvl complained of a frequent problem that potentially impacts aviation safety. Approximately 25 northwest of far pilot began first of numerous attempts to access dvl AWOS (automated WX report). Pilot needed dvl WX to determine whether instrument approach to airport was safe. Problem: another AWOS, (abr), transmits on the same frequency as dvl and is apparently much more powerful. Pilot was unable to receive the dvl AWOS until approximately 20 southeast of the airport. Pilot stated that this has been an issue several times in the past and he considered it unsafe and hazardous. The distance between abr and dvl is approximately 200 NM. Callback conversation with reporter revealed the following information: analyst learned that the reporter was submitting the report on repeated hearsay regarding this problem.
Original NASA ASRS Text
Title: RPTR ADVISES THAT BECAUSE BOTH AUTOMATED WX STATIONS BROADCAST ON THE SAME FREQ AND THE ABR XMITTER SEEMS THE STRONGER OF THE TWO, THE ASOS AT ABR OVERPOWERS AWOS AT DVL THUS MAKING USER RECEIPT OF WX FOR DVL DIFFICULT AND SOMETIMES IMPOSSIBLE. ACFT RPT THE NEED TO BE WITHIN 20 NM OF DVL BEFORE THEIR WX INFO CAN BE COPIED CLEARLY.
Narrative: A FLT ENRTE FAR TO DVL COMPLAINED OF A FREQUENT PROB THAT POTENTIALLY IMPACTS AVIATION SAFETY. APPROX 25 NW OF FAR PLT BEGAN FIRST OF NUMEROUS ATTEMPTS TO ACCESS DVL AWOS (AUTOMATED WX RPT). PLT NEEDED DVL WX TO DETERMINE WHETHER INSTRUMENT APCH TO ARPT WAS SAFE. PROB: ANOTHER AWOS, (ABR), TRANSMITS ON THE SAME FREQ AS DVL AND IS APPARENTLY MUCH MORE POWERFUL. PLT WAS UNABLE TO RECEIVE THE DVL AWOS UNTIL APPROX 20 SE OF THE ARPT. PLT STATED THAT THIS HAS BEEN AN ISSUE SEVERAL TIMES IN THE PAST AND HE CONSIDERED IT UNSAFE AND HAZARDOUS. THE DISTANCE BTWN ABR AND DVL IS APPROX 200 NM. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: ANALYST LEARNED THAT THE RPTR WAS SUBMITTING THE RPT ON REPEATED HEARSAY REGARDING THIS PROB.
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.