As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTOMATIC FIRE SHUTDOWN SYSTEM WILL NOT TEST. REF DMI 7050. APU AUTO FIRE SHUTDOWN SYS WILL NOT TEST. TRANSFERRED TO DMI 7050 IAW MEL 26-13-02, CAT C. MXC NOTIFIED. PLACARD INSTALLED. WILL COMPLY SP 26-13-02. ON T/S FOUND 32WF RELAY (APU S/D CONT) AT FAULT. REMOVED AND REPLACED APU S/D CONT.