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Air carrier flight crew inadvertently wound up with nobody wearing a headset and cockpit speaker turned down resulting in short period of being 'off frequency.'
| Attributes | |
| ACN | 436180 |
| Time | |
| Date | 199905 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : egtt.artcc |
| State Reference | FO |
| Altitude | msl single value : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : egtt.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 250 flight time total : 8800 flight time type : 3000 |
| ASRS Report | 436180 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 270 flight time total : 20000 flight time type : 1800 |
| ASRS Report | 436285 |
| Events | |
| Anomaly | non adherence : company policies non adherence : published procedure non adherence : far |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Due to weak radio transmission/reception, had overhead speaker volume up. However, this subsequently caused xcockpit squeal on xmissions. Captain turned speaker volume down to alleviate. Floater went to headset/boom microphone. Removed this later to eat. When lack of overhead radio traffic was noticed, made call to london control who advised he had been attempting contact for 7 mins.
Original NASA ASRS Text
Title: ACR FLC INADVERTENTLY WOUND UP WITH NOBODY WEARING A HEADSET AND COCKPIT SPEAKER TURNED DOWN RESULTING IN SHORT PERIOD OF BEING 'OFF FREQ.'
Narrative: DUE TO WEAK RADIO XMISSION/RECEPTION, HAD OVERHEAD SPEAKER VOLUME UP. HOWEVER, THIS SUBSEQUENTLY CAUSED XCOCKPIT SQUEAL ON XMISSIONS. CAPT TURNED SPEAKER VOLUME DOWN TO ALLEVIATE. FLOATER WENT TO HEADSET/BOOM MIKE. REMOVED THIS LATER TO EAT. WHEN LACK OF OVERHEAD RADIO TFC WAS NOTICED, MADE CALL TO LONDON CTL WHO ADVISED HE HAD BEEN ATTEMPTING CONTACT FOR 7 MINS.
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.