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B747 flight crew is unable to establish contact with oceanic controller via cpdlc (controller pilot data link communications) and enters a warning area en route to lax.
| Attributes | |
| ACN | 521590 |
| Time | |
| Date | 200108 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : gates |
| State Reference | FO |
| Altitude | msl single value : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Flight Phase | cruise : level cruise : enroute altitude change descent : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | flight attendant : currently qualified |
| Experience | flight time last 90 days : 33 flight time type : 2016 |
| ASRS Report | 521590 |
| Events | |
| Anomaly | airspace violation : entry non adherence : far other anomaly other |
| Resolutory Action | controller : issued advisory |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance ATC Facility |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Air carrier X departed hkg xx aug arrival lax aug/xx/01. Air carrier reported gates on cpdlc at XA12Z. We were expecting handoff to ZLA. At XA20Z we sent cpdlc message requesting frequency and handoff. No answer from oakland oceanic. At approximately XA23Z we called ZLA to request frequency. We were answered by various agencies but heard to contact center on XXX.xx. We established contact with ZLA and got our descent out of FL370 and were told we entered a military warning area but there was no problem and no paper was being filed. At no time did anyone try to contact us on guard or secal HF. Cpdlc never logged us off until nearing parking at our gate. There was no further incident after establishing contact with ZLA.
Original NASA ASRS Text
Title: B747 FLT CREW IS UNABLE TO ESTABLISH CONTACT WITH OCEANIC CTLR VIA CPDLC (CTLR PLT DATA LINK COMS) AND ENTERS A WARNING AREA ENRTE TO LAX.
Narrative: ACR X DEPARTED HKG XX AUG ARR LAX AUG/XX/01. ACR RPTED GATES ON CPDLC AT XA12Z. WE WERE EXPECTING HDOF TO ZLA. AT XA20Z WE SENT CPDLC MESSAGE REQUESTING FREQ AND HDOF. NO ANSWER FROM OAKLAND OCEANIC. AT APPROX XA23Z WE CALLED ZLA TO REQUEST FREQ. WE WERE ANSWERED BY VARIOUS AGENCIES BUT HEARD TO CONTACT CTR ON XXX.XX. WE ESTABLISHED CONTACT WITH ZLA AND GOT OUR DSCNT OUT OF FL370 AND WERE TOLD WE ENTERED A MIL WARNING AREA BUT THERE WAS NO PROB AND NO PAPER WAS BEING FILED. AT NO TIME DID ANYONE TRY TO CONTACT US ON GUARD OR SECAL HF. CPDLC NEVER LOGGED US OFF UNTIL NEARING PARKING AT OUR GATE. THERE WAS NO FURTHER INCIDENT AFTER ESTABLISHING CONTACT WITH ZLA.
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.