As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEARD UNIDENTIFIABLE ALARM IN FLIGHT 4 DIFFERENT TIMES APPROXIMATELY 10 TO 15 MINUTES APART AFTER CLIMB OUT AND LEVEL. DECLARED EMERGENCY AND LANDED IN HRL. RELEASED FOR SERVICE PER MEL : 26-26-03-02. LAVATORY SMOKE DETECTOR INOPERATIVE. COMPLIED WITH EA H-2612-T0380484, PULLED AND COLLARED C/B C770. R&R M3000 DISCRETE SMOKE DETECTOR PER ABOVE REF.OPS CK GOOD.OK FOR SERVICE.