As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 835, BOS-SJU, ON APPROACH INTO SJU THE FLAPS DEPLOYED BUT THE SLATS DID NOT. THE FLIGHT DID A GO-AROUND AND AN EMERGENCY WAS DECLARED. THE FLIGHT LANDED WITHOUT ANY FURTHER PROBLEMS. MAINTENANCE REPLACED THE LEFT NUMBER ONE FLAP ACTUATOR FOR POPPED TORQUE INDICATOR.