ZSE SECTOR 8 CTLR XFERS B767 DATA BLOCK WITH INCORRECT ALT TO ZSE SECTOR 18 CONFLICTING WITH CLBING FK28. INTRAFAC COORD NOT TIMELY TO RESOLVE SEPARATION CONFLICT.

Narrative

I WAS WORKING SECTOR 18 AND RECEIVED A DEP FROM GEG TO PDX -- ACR X. I CLBED THE ACFT TO FL230 (REQUESTED ALT -- FL260). THE SECTOR 8 CTLR RECEIVED A HDOF FROM THE HIGH ALT SECTOR (SECTOR 11) ON ACFT Y. THE ACFT'S DATA BLOCK HAD A TEMPORARY ALT OF FL240 ENTERED. THE ACFT CAME OVER REQUESTING DSCNT TO 12000 FT. CTLR INITIATED A HDOF TO ME ON ACFT Y AS HE WAS DIRECT AND LNDG MWH (APPROX 70 MI AWAY). ATC DSNDED THE ACFT Y TO 13000 FT AND TOLD HIM CTLR WOULD HAVE TO COORDINATE WITH SPOKANE APCH CTL IF HE STILL WANTED 12000 FT. I DID A RTE READOUT ON THE ACFT Y AND INFORMED CTLR (SECTOR 8 CTLR) THAT THEY SHOULD TURN THE ACFT Y OUT TO THE N; AS HE WOULD GET 'TRAPPED' OVER THE TOP OF MY DEP. CTLR HAD TRIED TO ENTER THE ASSIGNED ALT ON ACFT Y BUT WAS UNABLE TO; AS I HAD DATA BLOCK CTL. CTLR INSTRUCTED ACFT Y TO TURN R TO 270 DEGS FOR TFC. I THEN ASKED CTLR WHAT ALT ACFT Y WAS DSNDING TO; BECAUSE HIS DATA BLOCK STILL SHOWED HIS ASSIGNED ALT AS FL240. CTLR SAID 'HE IS DSNDING TO 12000 FT.' THIS WAS NOT GOING TO WORK WITH MY DEP AND CTLR STOPPED THE ACFT AT FL190. I INSTRUCTED ACR X TO MAINTAIN FL180 AND AS HE WAS AT 17800 FT AT THAT TIME; THAT HE WOULD GO THROUGH FL180 AND HAD TO DSND BACK DOWN TO FL180. SEPARATION WAS LOST (500 FT/2.62 MI). IF SHE HAD BEEN ABLE TO ENTER THE ASSIGNED ALT IN THE DATA BLOCK; WE COULD HAVE STOPPED THE ACFT'S CLB/DSCNT SOONER AND NOT LOST SEPARATION. OR; IF PRIOR COORD HAD BEEN DONE BEFORE DSNDING THE ACFT Y IN MY AIRSPACE; THIS COULD HAVE BEEN AVOIDED. SUPPLEMENTAL INFO FROM ACN 460772: IN HINDSIGHT; I SHOULD HAVE HAD THE ADJACENT CTLR WORK THE AIRPLANE RIGHT FROM THE START. IT WOULD ALSO HAVE HELPED IF I COULD HAVE BEEN ABLE TO ENTER THE CORRECT ALT IN THE DATA BLOCK SO IT WOULD HAVE ACCURATELY REFLECTED WHAT MY ACFT WAS DOING.