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B747 captain allows unauthorized, company general conversation to be conducted on a zan frequency with another en route company aircraft. Another aircraft challenges them to switch to interplane common frequency.
| Attributes | |
| ACN | 515410 |
| Time | |
| Date | 200106 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zan.artcc |
| State Reference | AK |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : ogg.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B747-200 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 1200 |
| ASRS Report | 515410 |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure other anomaly other |
| Resolutory Action | other |
| Supplementary | |
| Problem Areas | Environmental Factor Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
While returning to anc zan heard us attempt to contact a large aircraft ahead of and 1000 ft above us. Zan informed us that they were on a different zan frequency. This is in an area where you are in and out of zan radio contact. We raised the other aircraft on the zan frequency and asked them to contact us on interplane common 123.45 frequency. They answered us on zan frequency and instead of insisting that they switch to 123.45, I discussed our non-operational question (jumpseating) on zan frequency. I thought that since I was not in radio contact with zan, that I would not be disrupting any other aircraft communicating with zan, but an aircraft approximately 200 mi behind us loudly complained on zan frequency for us to switch to 123.45 because we were making it impossible for them to communication with zan. In retrospect, I should have insisted that the other aircraft switch to 123.45 instead of garbaging-up zan frequency.
Original NASA ASRS Text
Title: B747 CAPT ALLOWS UNAUTH, COMPANY GENERAL CONVERSATION TO BE CONDUCTED ON A ZAN FREQ WITH ANOTHER ENRTE COMPANY ACFT. ANOTHER ACFT CHALLENGES THEM TO SWITCH TO INTERPLANE COMMON FREQ.
Narrative: WHILE RETURNING TO ANC ZAN HEARD US ATTEMPT TO CONTACT A LARGE ACFT AHEAD OF AND 1000 FT ABOVE US. ZAN INFORMED US THAT THEY WERE ON A DIFFERENT ZAN FREQ. THIS IS IN AN AREA WHERE YOU ARE IN AND OUT OF ZAN RADIO CONTACT. WE RAISED THE OTHER ACFT ON THE ZAN FREQ AND ASKED THEM TO CONTACT US ON INTERPLANE COMMON 123.45 FREQ. THEY ANSWERED US ON ZAN FREQ AND INSTEAD OF INSISTING THAT THEY SWITCH TO 123.45, I DISCUSSED OUR NON-OPERATIONAL QUESTION (JUMPSEATING) ON ZAN FREQ. I THOUGHT THAT SINCE I WAS NOT IN RADIO CONTACT WITH ZAN, THAT I WOULD NOT BE DISRUPTING ANY OTHER ACFT COMMUNICATING WITH ZAN, BUT AN ACFT APPROX 200 MI BEHIND US LOUDLY COMPLAINED ON ZAN FREQ FOR US TO SWITCH TO 123.45 BECAUSE WE WERE MAKING IT IMPOSSIBLE FOR THEM TO COM WITH ZAN. IN RETROSPECT, I SHOULD HAVE INSISTED THAT THE OTHER ACFT SWITCH TO 123.45 INSTEAD OF GARBAGING-UP ZAN FREQ.
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.