What was found
T/E FLAP DISAGREE LIGHT ON WHEN FLAPS SELECTED TO 5. ONLY LT ENG RUNNING. TROUBLESHOT IAW FIM, ENDED UP AT BLOCK NR 53. REPLACED SOLENOID VALVE, NO HELP. STILL GET DISAGREE. TESTED DEPRESSURIZATION MODULE PRESSURE SWITCH FOUND OPEN WITH HYD SYS PRESSURIZED. SUSPECT BAD SWITCH. REPLACED PRESSURE SWITCH, NO HELP. NEEDS FURTHER TROUBLESHOOTING. NEED TO ACCOMPLISH OPERATIONAL TEST OF FLAP-SLAT SOLENOID VALVEON ACCOUNT OF REPLACEMENT. CKS OK. REPLACED FSEU-1. PLACED NR 2 FSEU (-40) IN NR1 POS IAW MM.