As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAULT LIGHT ILLUMINATED DURING APU START ATTEMPT @ FL 350 SUCCESSFUL CSS ACCOMPLISHED DURING DESCENT, AFTER FAULT LIGHT EXTINGUISHED, @ FL 310. GROUNDED - YES. R&R OF APU FIREPANEL, GOOD APU START, NO FAULTS. PER SEAMC JEREMY OK TO CLEAR MEL 49-1B. PLACARDS REMOVED.