As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO BOTTLE LOW CAUT MSG RCVD WHEN DESCENDING INTO ORD. CW QRH PROCEDURE LANDED WITHOUT FURTHER INCIDENT ******AIRCRAFT REMOVED FROM SERVICE******* REMOVED AND REPLACED LH CARGO FIRE EXT CONTAINER IAW AWA SUP 10-099B OPS CHECK GOOD S/N OFF 41462D1 S/N ON 47606D1