B777-200 flight crew reports loss of satcom; datalink and HF communication while transiting edmonton...

Attributes
ACN	786059
Time
Date	200805
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : czeg.artcc
State Reference	AB
Altitude	msl single value : 34000
Aircraft 1
Controlling Facilities	artcc : czeg.artcc
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain observation : company check pilot oversight : pic
Experience	flight time last 90 days : 200 flight time total : 22000 flight time type : 2000
ASRS Report	786059
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 160 flight time total : 12000 flight time type : 5
ASRS Report	785861
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated flight crew : overcame equipment problem
Consequence	other other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

While in cruise; EICAS for no datalink and no satvoice appeared. Condition continued for approximately 30 mins. Followed flight manual procedures for indications. Communications were with edmonton center and regular position reports were being made on VHF. After unsuccessful attempts to restore datalink/satvoice were attempted; crew initiated multiple attempts to reach company using various HF frequencys. Edmonton center advised that they had no way of passing our position to company. Crew was not successful trying to reach company maintenance HF; crew then contacted arctic radio and provided position report to be relayed to company. Intermittent problem resolved itself without crew action. Contacted company by satvoice to advise situation. Company advised they had been attempting to reach us for a period of time and were unsuccessful. Company advised that they had another aircraft trying to reach us as well but no xmissions were heard from that flight. Also received a SELCAL from anchorage center shortly after reaching company conveying that they had also been trying to reach us to pass along a possible solution to remedy the no datalink issue. Reported to maintenance control the problem we experienced once datalink was restored. They advise that there was a similar history of the same problem on record. Sent new write-up via ACARS. Continued flight with only minor disruption of datalink/satvoice system.

Original NASA ASRS Text

Title: B777-200 FLT CREW REPORTS LOSS OF SATCOM; DATALINK AND HF COM WHILE TRANSITING EDMONTON AND ARCTIC FIRS. SITUATION PARTIALLY RESOLVES ITSELF ALLOWING FLT TO CONTINUE TO DES.

Narrative: WHILE IN CRUISE; EICAS FOR NO DATALINK AND NO SATVOICE APPEARED. CONDITION CONTINUED FOR APPROX 30 MINS. FOLLOWED FLT MANUAL PROCS FOR INDICATIONS. COMS WERE WITH EDMONTON CTR AND REGULAR POS RPTS WERE BEING MADE ON VHF. AFTER UNSUCCESSFUL ATTEMPTS TO RESTORE DATALINK/SATVOICE WERE ATTEMPTED; CREW INITIATED MULTIPLE ATTEMPTS TO REACH COMPANY USING VARIOUS HF FREQS. EDMONTON CTR ADVISED THAT THEY HAD NO WAY OF PASSING OUR POS TO COMPANY. CREW WAS NOT SUCCESSFUL TRYING TO REACH COMPANY MAINT HF; CREW THEN CONTACTED ARCTIC RADIO AND PROVIDED POS RPT TO BE RELAYED TO COMPANY. INTERMITTENT PROB RESOLVED ITSELF WITHOUT CREW ACTION. CONTACTED COMPANY BY SATVOICE TO ADVISE SIT. COMPANY ADVISED THEY HAD BEEN ATTEMPTING TO REACH US FOR A PERIOD OF TIME AND WERE UNSUCCESSFUL. COMPANY ADVISED THAT THEY HAD ANOTHER ACFT TRYING TO REACH US AS WELL BUT NO XMISSIONS WERE HEARD FROM THAT FLT. ALSO RECEIVED A SELCAL FROM ANCHORAGE CTR SHORTLY AFTER REACHING COMPANY CONVEYING THAT THEY HAD ALSO BEEN TRYING TO REACH US TO PASS ALONG A POSSIBLE SOLUTION TO REMEDY THE NO DATALINK ISSUE. RPTED TO MAINT CTL THE PROB WE EXPERIENCED ONCE DATALINK WAS RESTORED. THEY ADVISE THAT THERE WAS A SIMILAR HISTORY OF THE SAME PROB ON RECORD. SENT NEW WRITE-UP VIA ACARS. CONTINUED FLT WITH ONLY MINOR DISRUPTION OF DATALINK/SATVOICE SYS.

Data retrieved from NASA's ASRS site as of May 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.

B777-200 flight crew reports loss of satcom; datalink and HF communication while transiting edmonton and arctic firs. Situation partially resolves itself allowing flight to continue to des.