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B767 crew encountered weak and poor communication transmitter with egpx such that communication was lost with ATC for over 20 mins.
| Attributes | |
| ACN | 536817 |
| Time | |
| Date | 200201 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : egpk.airport |
| State Reference | FO |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : egpx.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 140 flight time total : 14000 flight time type : 1800 |
| ASRS Report | 536817 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | ATC Facility |
| Primary Problem | ATC Facility |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | communication equipment : egpx.artcc |
Narrative:
In cruise, approaching first oceanic reporting point we called scottish ATC, who said they had been trying to reach us for 20 mins. We believe this is what happened. Scottish ATC had a scratchy, weak transmitter but our ears were getting blown out by other aircraft on frequency, when we had volume high enough to clearly hear center. I believe we tweaked the radios down too much, and didn't realize we were cutting scottish 'off.' note: scottish ATC has notoriously weak radios. This is a situation that can easily happen again.
Original NASA ASRS Text
Title: B767 CREW ENCOUNTERED WEAK AND POOR COM XMITTER WITH EGPX SUCH THAT COM WAS LOST WITH ATC FOR OVER 20 MINS.
Narrative: IN CRUISE, APCHING FIRST OCEANIC RPTING POINT WE CALLED SCOTTISH ATC, WHO SAID THEY HAD BEEN TRYING TO REACH US FOR 20 MINS. WE BELIEVE THIS IS WHAT HAPPENED. SCOTTISH ATC HAD A SCRATCHY, WEAK XMITTER BUT OUR EARS WERE GETTING BLOWN OUT BY OTHER ACFT ON FREQ, WHEN WE HAD VOLUME HIGH ENOUGH TO CLRLY HEAR CTR. I BELIEVE WE TWEAKED THE RADIOS DOWN TOO MUCH, AND DIDN'T REALIZE WE WERE CUTTING SCOTTISH 'OFF.' NOTE: SCOTTISH ATC HAS NOTORIOUSLY WEAK RADIOS. THIS IS A SIT THAT CAN EASILY HAPPEN AGAIN.
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.