2005-09 · NASA ASRS report 673156
ZOA CTLR EXPRESSED CONCERN REGARDING THE NEW OCEANIC EQUIP AND CLRNC CONFIRMATION PROCS UTILIZED.
TODAY; WHILE WORKING OC9; AT XA52Z; ACR X WAS GIVEN A CPDLC CLRNC TO CLB FROM FL360 TO FL370. BTWN XA53-XA59Z; THE CTLR RECEIVED 3 ERRONEOUS NDA AND FN-CAD MESSAGES. AT XA59Z; THE CTLR REISSUED A CPDLC CLRNC FOR ACR X TO CLB FROM FL360 TO FL370. AT XB02Z; THE CTLR RECEIVED A NO RESPONSE FROM ACFT WARNING MESSAGE AND ISSUED A HF CLRNC THROUGH SFO COMRDO FOR ACR X TO CLB FROM FL360 TO FL370. AT XB04Z; THE CTLR RECEIVED ANOTHER ERRONEOUS FN-CAD MESSAGE. AT XB08Z; THE CTLR RECEIVED A PLT READBACK (ON HIS ORIGINAL COMRDO CLRNC) FROM SFO COMRDO THROUGH HF; STATING THE ACFT WAS ALREADY LEVEL AT FL370. (IT APPEARS THAT THE ACFT RECEIVED A CPDLC CLRNC PRIOR TO GETTING THIS HF CLRNC. IF SO; WHY DID THE CTLR GET THE WARNING MESSAGE THAT THE CLRNC HAD NOT BEEN DELIVERED?) AT XB09Z; THE CTLR RECEIVED A NO RESPONSE FROM ACFT WARNING MESSAGE. AT XB12Z; THE CTLR REQUESTED THAT ACR X CONFIRM ALT. AT XB14Z; THE CTLR RECEIVED A FAIL NDA MESSAGE. SOMETIME AROUND XB15Z; THE CTLR SENT A MESSAGE THROUGH SFO COMRDO TO CONFIRM ALT ON ACR X AND RECEIVED A LEVEL RPT AT FL370. ADDITIONALLY AT XB21Z; THE CTLR RECEIVED A CONTACT TYO CTR MESSAGE WHICH CONTAINED THE WRONG CONTACT FREQS. SEVERAL MESSAGES WERE SUBSEQUENTLY SENT TO THE CTLR PERTAINING TO THE WRONG CONTACT INFO BEING SENT. THIS IS A RECURRING PROB; WHICH MAY CAUSE OR CONTRIBUTE TO AN ACCIDENT(S) OR INCIDENT(S). THIS WAS A CONTRIBUTING FACTOR IN A RECENT 'NON OCCURRENCE' WHICH LED TO AN OCEANIC ATC CTLR BEING PUT ON AN OPPORTUNITY TO DEMONSTRATE PERFORMANCE.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.
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