Narrative:

While descending into seattle, we were cleared out of cruise FL240 at pilot's discretion by ZSE. We were then given cross jaksn intersection (on glasr four arrival) at 16000 ft. The arrival reads 'cross jaksn at 250 KTS' north flow, cross at 16000 ft. South flow, cross at 12000 ft. The FMC had the constraints of 250 KTS/16000 ft entered. ARTCC then asked us to 'descend through 220,' then cross jaksn at 16000 ft. That request, 'through 220' forced us to change our descent profile, and we reentered jaksn at 16000 ft without the 250 KT speed restr in the FMC. We had changed the profile, and twice been given 'jaksn at 16000 ft' without speed constraint. We passed jaksn at 16000 ft and 295 KTS. We were switched to approach who asked what our airspeed was as we passed jaksn. We replied 295 KTS, they asked us to slow to 220 KTS. We complied and began to wonder if they expected 250 KTS. Due to 'cross at 250 KTS.' we thought once taken off the descent profile, either geographically with vectors or altitude-wise with requests other than depicted on arrival plate, and subsequently not being asked to comply with airspeed restr, we were not bound by the airspeed restr. Supplemental information from acn 538169: we should have asked if ARTCC still wanted speed per approach plate. Throughout this event, as a crew, we were busy with approach plate brief and our descent and approach checklists.

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Original NASA ASRS Text

Title: A B757 FLC EXCEEDS THE CHARTED ARR SPD OF 250 KTS OVER JAKSN INTXN WHILE ON FREQ WITH SEATAC APCH CTLR, S-46, WA.

Narrative: WHILE DSNDING INTO SEATTLE, WE WERE CLRED OUT OF CRUISE FL240 AT PLT'S DISCRETION BY ZSE. WE WERE THEN GIVEN CROSS JAKSN INTXN (ON GLASR FOUR ARR) AT 16000 FT. THE ARR READS 'CROSS JAKSN AT 250 KTS' N FLOW, CROSS AT 16000 FT. S FLOW, CROSS AT 12000 FT. THE FMC HAD THE CONSTRAINTS OF 250 KTS/16000 FT ENTERED. ARTCC THEN ASKED US TO 'DSND THROUGH 220,' THEN CROSS JAKSN AT 16000 FT. THAT REQUEST, 'THROUGH 220' FORCED US TO CHANGE OUR DSCNT PROFILE, AND WE REENTERED JAKSN AT 16000 FT WITHOUT THE 250 KT SPD RESTR IN THE FMC. WE HAD CHANGED THE PROFILE, AND TWICE BEEN GIVEN 'JAKSN AT 16000 FT' WITHOUT SPD CONSTRAINT. WE PASSED JAKSN AT 16000 FT AND 295 KTS. WE WERE SWITCHED TO APCH WHO ASKED WHAT OUR AIRSPD WAS AS WE PASSED JAKSN. WE REPLIED 295 KTS, THEY ASKED US TO SLOW TO 220 KTS. WE COMPLIED AND BEGAN TO WONDER IF THEY EXPECTED 250 KTS. DUE TO 'CROSS AT 250 KTS.' WE THOUGHT ONCE TAKEN OFF THE DSCNT PROFILE, EITHER GEOGRAPHICALLY WITH VECTORS OR ALT-WISE WITH REQUESTS OTHER THAN DEPICTED ON ARR PLATE, AND SUBSEQUENTLY NOT BEING ASKED TO COMPLY WITH AIRSPD RESTR, WE WERE NOT BOUND BY THE AIRSPD RESTR. SUPPLEMENTAL INFO FROM ACN 538169: WE SHOULD HAVE ASKED IF ARTCC STILL WANTED SPD PER APCH PLATE. THROUGHOUT THIS EVENT, AS A CREW, WE WERE BUSY WITH APCH PLATE BRIEF AND OUR DSCNT AND APCH CHKLISTS.

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.