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B777 flight crew conferred with an sfo comrdo co in order to clarify that the ZOA oceanic cpdlc (controller-pilot datalink communications) interface had failed. At that time, they updated mandatory intersection reporting times.
| Attributes | |
| ACN | 575255 |
| Time | |
| Date | 200302 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zoa.artcc |
| State Reference | CA |
| Altitude | msl single value : 36000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa.artcc tower : cle.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : r464.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 575255 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | non adherence : published procedure non adherence other other anomaly other |
| Independent Detector | atc equipment other atc equipment : cpdlc other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft ATC Human Performance Navigational Facility |
| Primary Problem | Navigational Facility |
Narrative:
Logged onto zak for cpdlc sfo-ogg at XC36Z prior to pushback. ATC communication showed link established. Sent 2 position reports on time. Also requested altitude change twice. At west 139 degrees, ATC had not gotten anything from us and requested position reports for baart and bacon. Also informed that data link with oak not active. Our communication log showed connected and reports sent at XB30Z, XC14Z, XC28Z, XC35Z. Logged off per SOP XP18Z and received EICAS message. ATC datalink lost at XF18Z. Flight said they were informed of shutoff at XA41Z and link lost at XA42Z. It took oak ATC 1 1/2 hours to miss us! Showed everything normal.
Original NASA ASRS Text
Title: B777 FLT CREW CONFERRED WITH AN SFO COMRDO CO IN ORDER TO CLARIFY THAT THE ZOA OCEANIC CPDLC (CTLR-PLT DATALINK COMS) INTERFACE HAD FAILED. AT THAT TIME, THEY UPDATED MANDATORY INTXN RPTING TIMES.
Narrative: LOGGED ONTO ZAK FOR CPDLC SFO-OGG AT XC36Z PRIOR TO PUSHBACK. ATC COM SHOWED LINK ESTABLISHED. SENT 2 POS RPTS ON TIME. ALSO REQUESTED ALT CHANGE TWICE. AT W 139 DEGS, ATC HAD NOT GOTTEN ANYTHING FROM US AND REQUESTED POS RPTS FOR BAART AND BACON. ALSO INFORMED THAT DATA LINK WITH OAK NOT ACTIVE. OUR COM LOG SHOWED CONNECTED AND RPTS SENT AT XB30Z, XC14Z, XC28Z, XC35Z. LOGGED OFF PER SOP XP18Z AND RECEIVED EICAS MESSAGE. ATC DATALINK LOST AT XF18Z. FLT SAID THEY WERE INFORMED OF SHUTOFF AT XA41Z AND LINK LOST AT XA42Z. IT TOOK OAK ATC 1 1/2 HRS TO MISS US! SHOWED EVERYTHING NORMAL.
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.