Having just read the accident report, it would seem the likely but unproven cause of the accident was an intermittant failure of the R2-5 relay which determines the air/ground mode of certain systems, including the rat heat and T/O config warning. This was a recurrent fault but there was no clear maintenance procedure to follow and the engineer would have needed prior experience of this fault to know what it was. They dispatched legally in accordance with the MEL.
The captain interrupted the after take off checklist right at the point when they should have selected flaps to tell the F/O to call for taxi clearance. During the taxi checks, flaps were not mentioned. During the line-up checks the F/O applied 'lip service' to the checks and read what the flaps should be reading not what they were.
The T/O config warning failed to sound, probably because of the failure of the R2-5 relay. The aircraft stick shaker activated after rotate and was not recognised as real by either pilot, the co-pilot calling 'engine failure?' and the Captain asking how he could turn it off.
I don't quite understand why the right thrust lever was retarded as they rolled to the right?
I also am not familiar with the Spanair MD-80 checklist. Is the after take-off flaps check 'read and do' or 'do and read'? Also, is flaps a specific check in the taxi checks or is it only included in the 'take-off briefing' review? (Pages 44-45 refer but are not clear).
Full report here:
http://www.fomento.es/NR/rdonlyres/9...NO_01_ENG1.pdf