ACR LGT CLRED CROSS WYLEE INTXN 10000 FT 250 KTS. AT 14000 FT ATC SAID TO MAINTAIN 11000 FT. FMS REPROGRAMMED BUT FLT CTL PANEL WAS NOT CHANGED. AUTOPLT LEVELED THE ACFT AT 10000 FT. CTLR ADVISED NO PROB.

Narrative

THE FLT WAS CLRED TO CROSS WYLEE INTXN AT 250 KTS AND 10000 FT; 3000-4000 FT ABOVE ATC SAID TO MAINTAIN 11000 FT. THE FMS WAS REPROGRAMMED BUT THE FLT CTL PANEL (ALT WINDOW) WAS NOT. THE PROFILE MODE OF THE FMS WAS DISENGAGED BECAUSE THE FMS SCHEDULE WAS FALLING BEHIND AND THE AUTOPLT LEVELED THE ACFT AT 10000 FT. THIS IS A CLASSIC CASE OF RELYING ON THE AUTOMATION AND NOT FLYING THE ACFT FIRST. IT IS OPPOSITE THE WAY I TEACH STUDENTS (I AM A LINE CHK AIRMAN) TO MANAGE THE FMS SYS. I TEACH THE STUDENT TO FLY THE ACFT FIRST AND THEN PROGRAM THE FMS ONLY IF TIME ALLOWS. WX WAS VERY GOOD WITH GOOD VISIBILITY AND THE WORKLOAD WAS VERY LOW. COMPANY PROCS SHOULD HAVE PREVENTED THE INCIDENT; IF FOLLOWED CORRECTLY. THE HABIT PATTERNS I TRY TO USE ARE TO PREVENT THIS TYPE OF INCIDENT IF FOLLOWED. THE FMS WAS JUST RELIED UPON TOO MUCH. ATC SAID THE ALT CAUSED NO PROBS AND DID NOT ADVISE US TO PREVENT THE INCIDENT. WE WERE VFR DURING THE WHOLE TIME; LOOKING OUTSIDE AND DID NOT SEE ANY OTHER ACFT AT ALL. WE COULD SEE NO REASON FOR THE CHANGE IN ALT EVEN THOUGH WE INTENDED TO COMPLY WITH IT.