Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Confusion; Human-Machine Interface
Aircraft Equipment Problem Less Severe
Chart Or Publication; Procedure; Aircraft; Human Factors
Please check out the recently revised ILS approaches to Rwy 34 L & C at Seattle.  It appears to me that their missed approaches are not properly coded in the FMC database.  There are fixes that the narratives say should be crossed at 3;000 FT; THEN climb to 5;000.  The FMCs show 3000A; but should be 3000B.  I see nothing in our flight paperwork referencing this.
Air carrier Captain advises the FMC database in his aircraft type misprograms the altitudes on the MAP procedures on the SEA ILS 34L&C approaches stating the intermediate fixes (WEXUB/34L COYLA/34C) and are to be crossed at or ABOVE 3;000 MSL while the texts of both procedures state that the climb to 5;000 should begin at those fixes; thus requiring 3;000 MSL to not be exceeded until passing.