As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY DECLARED. ON POST FLT DISCOVERED LEFT FLAP EXTENDED ABOUT ONE INCH & RT FLAP FULLY RETRACTED FLUSH WITH THE FLAP HANDLE IN THE FULL UP POSITION. ' HYD PRESS' AMBER ANNUNCIATOR REMAINED ILLUMINATED IN FLT AFTER FLAP RETRACTION. PERFORMED 'HYD PRESS' ABNORMAL CHECKLIST. REPLACED LT FLAP ACTUATOR, WITH NEW. OPS AND LEAK CHECK GOOD. DONE IN REF. TO CE-560XL MM 27-51-04.