As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING BASIC CHECK MX VISIT, TESTING OF THE CARGO COMPARTMENT FIRE EXTINGUISHING SYS WAS SUCCSESSFULLY ACCOMPLISHED, REF TASK CARD 26-23-13-001-U. OPPORTUNITY INSPECTION WHILE ACCOMPLISHING THIS TASK REVEALED THAT THE HIGH RATE FIRE EXTINGUISHER (HRD) HAD THE EXPLOSIVE CARTRIDGES (SQUIBS) INNCORRECTLY INSTALLED "REVERSED" IN THE HRD UNIT.