What was found
IN CRUISE AT FL190 AUTO PILOT ENGAGED. AUTO PILOT LAGGED FLIGHT DIRECTOR RESULTING IN 400 FPM CLIMB & 500 FPM OSCILLATIONS, FROM CAPTURED ALTITUDE, 1/8 INCH GAP BETWEEN FLIGHT DIRECTOR & ACFT SYMBOL. LEVELED AT 2100 FT ON APPROACH & AGAIN WITH GLIDESLOPE CAPTURED, AURAL TRIM ELEVATOR WARNING WENT OFF. DEFERRED AUTO PILOT IAW MEL 22-1, ACFT IS NON-COMPLAINT FOR CAT II OPERATIONS, M PROCEDURE COMPLIED WITH MEL IS OPEN. T/S IAW FIM 22-12-14 RAR NR 1 LIGHTNING/HIRF IAW AMM 22-12-08 OPS CHECK GOOD MEL ITEM RESTORED.