What was found
SEA FLIGHT NR 2367: Y/D DISENGAGED IN CLIMB WITH FLASHING MESSAGES ON PFD'S. A/P WAS NOT ENGAGED AT THE TIME. CLEARED MESSAGES PER E/A CHECKLIST. ENGAGED A/P, Y/D WORK NORMAL. MAINTENANCE CLEANED SCREEN ON IOP BOX AND RE-RACKED NR 1 FGM. C/W CAT 3 CHECK IAW MTC 6221101 WITH NO DEFECTS. ALSO C/W Y/D CHECK IAW AMM 22-11-36-710-801 WITH NO DEFECTS. A/C REMAINS CAT 3. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.