As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION- ENROUTE HAD C HYD SYS PRESS EICAS MSG - RAN QRH ITEMS DIVERTED TO KMCI. HAD DPURNIOUS LE SLAT ASSYM WHICH WENT AWAY AWHILE LATER.REPLACED CTR HYD SYS PRESSURE SWITCH PER M/M 29-11-09 & TESTED PER FIM 29-11-00-815-826. NO FAULTS NOTED. OPS CK'D LE SLATS PER M/M 27-81-00, NO FAULTS NOTED.