As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TRANSITION FROM CLIMB TO CRUISE A FAINT GROWLING NOISE WAS HEARD IN THE REAR OF THE ACFT. WHEN SPEED INCREASED FROM 230 KTS TO 275 KTS THE SOUND BECAME MORE APPARENT. CREW REQUESTED TO DIVERT. UPON DESCENDING THROUGH 7000 MSL A FAINT POPPING NOISE WAS HEARD. CREW THEN REQUESTED PRIORITY HANDLING AND DECLARED AN EMERGENCY. ACFT LANDING NORMAL ON RNWY 30L. MX CREW DISPATCHED. MX REMOVED AND REPLACED THE RT NACELLE ANTI-ICE AND THE RT ENG ANTI-ICE VALVE. PERFORMANCE RUN AND LEAK CHECK GOOD. NO FURTHER DEFECTS.