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A gii pilot in european airspace had difficulty with his communication radios using 8.33 MHZ spacing. ATC provided alternate frequencys.
| Attributes | |
| ACN | 703143 |
| Time | |
| Date | 200607 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lfff.artcc |
| State Reference | FO |
| Altitude | msl single value : 40000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : lfff.artcc |
| Operator | common carrier : air taxi |
| Make Model Name | Gulfstream II |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 88 flight time total : 9075 flight time type : 250 |
| ASRS Report | 703143 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On a flight from lfpg to cyqx while in european high altitude airspace; we were assigned frequencys using 8.33 spacing. The push-button switch used to utilize these frequencys would not switch when pushed. I reported a problem with the switching mechanism to ATC and requested alternate frequencys. We had the same problem on the inbound flight to paris; but when on the ground we worked with the switch and were able to obtain proper switching. It operations checked normal until we were in-flight again and then failed. There is no back-up to the single push-button switch. One switch changes both radios; there should probably be a separate switch for each radio.
Original NASA ASRS Text
Title: A GII PLT IN EUROPEAN AIRSPACE HAD DIFFICULTY WITH HIS COM RADIOS USING 8.33 MHZ SPACING. ATC PROVIDED ALTERNATE FREQS.
Narrative: ON A FLT FROM LFPG TO CYQX WHILE IN EUROPEAN HIGH ALT AIRSPACE; WE WERE ASSIGNED FREQS USING 8.33 SPACING. THE PUSH-BUTTON SWITCH USED TO UTILIZE THESE FREQS WOULD NOT SWITCH WHEN PUSHED. I RPTED A PROB WITH THE SWITCHING MECHANISM TO ATC AND REQUESTED ALTERNATE FREQS. WE HAD THE SAME PROB ON THE INBOUND FLT TO PARIS; BUT WHEN ON THE GND WE WORKED WITH THE SWITCH AND WERE ABLE TO OBTAIN PROPER SWITCHING. IT OPS CHKED NORMAL UNTIL WE WERE INFLT AGAIN AND THEN FAILED. THERE IS NO BACK-UP TO THE SINGLE PUSH-BUTTON SWITCH. ONE SWITCH CHANGES BOTH RADIOS; THERE SHOULD PROBABLY BE A SEPARATE SWITCH FOR EACH RADIO.
Data retrieved from NASA's ASRS site as of January 2009 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.