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Some commuter small transport's unable to transmit to msp approach control in a small area near the runway 11 left and right ILS approachs.
| Attributes | |
| ACN | 181392 |
| Time | |
| Date | 199106 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : msp |
| State Reference | MN |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : msp |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 250 flight time total : 2800 flight time type : 1200 |
| ASRS Report | 181392 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | other physical facility |
Narrative:
(This is a recurring problem. Whether this problem is only in the small transport or not I do not know. It doesn't occur in one specific aircraft). Msp approach can not receive our xmissions in the narrow area (15-20 KM) inbound for the 11 left and right approachs (along the extended ctrlines of the 11's). It is difficult to know if this happens each time an small transport flies through this area because we are not transmitting in response to ATC instructions every time in this area. It has occurred 4 previous times that ATC will call repeatedly and we will respond repeatedly and as soon as we are inside 15 DME, our calls are heard. I have noticed that this problem happens when transmitting on the captain's #1 comm. If it has happened on the #2 comm, I'm not sure. Many other small transport pilots have noticed this dead spot.
Original NASA ASRS Text
Title: SOME COMMUTER SMT'S UNABLE TO TRANSMIT TO MSP APCH CTL IN A SMALL AREA NEAR THE RWY 11 L AND R ILS APCHS.
Narrative: (THIS IS A RECURRING PROB. WHETHER THIS PROB IS ONLY IN THE SMT OR NOT I DO NOT KNOW. IT DOESN'T OCCUR IN ONE SPECIFIC ACFT). MSP APCH CAN NOT RECEIVE OUR XMISSIONS IN THE NARROW AREA (15-20 KM) INBND FOR THE 11 L AND R APCHS (ALONG THE EXTENDED CTRLINES OF THE 11'S). IT IS DIFFICULT TO KNOW IF THIS HAPPENS EACH TIME AN SMT FLIES THROUGH THIS AREA BECAUSE WE ARE NOT XMITTING IN RESPONSE TO ATC INSTRUCTIONS EVERY TIME IN THIS AREA. IT HAS OCCURRED 4 PREVIOUS TIMES THAT ATC WILL CALL REPEATEDLY AND WE WILL RESPOND REPEATEDLY AND AS SOON AS WE ARE INSIDE 15 DME, OUR CALLS ARE HEARD. I HAVE NOTICED THAT THIS PROB HAPPENS WHEN XMITTING ON THE CAPT'S #1 COMM. IF IT HAS HAPPENED ON THE #2 COMM, I'M NOT SURE. MANY OTHER SMT PLTS HAVE NOTICED THIS DEAD SPOT.
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.