As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU SHUNT GND BURNT THROUGH SHEAR TIE. REAR FUSELAGE II– FRAME 80 APU SHUNT– BURN DAMAGE - PERMANENT REPAIR. COMPLIED ON ETD2018-145-092121. DETAILS FOR THIS REPAIR HAVE BEEN EMAILED TO 9-AMC-SDR-PROGMGR@FAA.GOV, WITH SUBJECT 21144 SDR RAIA201808280001.