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Flight crew of medium large transport taxiing at ord received clearly on 121.75 but tower was unable to receive. Flight crew switched to 121.9 and reestablished 2-WAY communication.
| Attributes | |
| ACN | 155522 |
| Time | |
| Date | 199008 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | ground other : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 50 flight time total : 4800 flight time type : 50 |
| ASRS Report | 155522 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 180 flight time total : 10000 flight time type : 2500 |
| ASRS Report | 155432 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
On taxi-out at ord we experienced a loss of communication on frequency 121.75. We were able to receive ground and comply with their directions, however they were unable to receive us. We replied numerous times on both radios to no avail. Finally we switched over to 121.9 where we were able to be heard. We suspect that it was not our radio because we tried both of them. However, when we switched frequencys we were immediately acknowledged.
Original NASA ASRS Text
Title: FLT CREW OF MLG TAXIING AT ORD RECEIVED CLEARLY ON 121.75 BUT TWR WAS UNABLE TO RECEIVE. FLT CREW SWITCHED TO 121.9 AND REESTABLISHED 2-WAY COM.
Narrative: ON TAXI-OUT AT ORD WE EXPERIENCED A LOSS OF COM ON FREQ 121.75. WE WERE ABLE TO RECEIVE GND AND COMPLY WITH THEIR DIRECTIONS, HOWEVER THEY WERE UNABLE TO RECEIVE US. WE REPLIED NUMEROUS TIMES ON BOTH RADIOS TO NO AVAIL. FINALLY WE SWITCHED OVER TO 121.9 WHERE WE WERE ABLE TO BE HEARD. WE SUSPECT THAT IT WAS NOT OUR RADIO BECAUSE WE TRIED BOTH OF THEM. HOWEVER, WHEN WE SWITCHED FREQS WE WERE IMMEDIATELY ACKNOWLEDGED.
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.