As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APU CSS ATTEMPT AT FL 380, FAULT LIGHT ILLUMINATED. FAULT LIGHT EXTINGUISHED WITHIN 5 MINS. QRH ACCOMPLISHED AT FL 340 APU SUCCESSFULLY STARTED. ACFT GROUNDED. BITE CHECK OF APU ECU SHOWS ONE OCCURRENCE OF FAULT CODE 49-41010. NO PREVIOUS HISTORY 90 DAYS AND NO CURRENT FAULTS. PERFORMED APU OPS TEST IAW AMM 49-11-00-710-801. OPS TEST GOOD. PERFORMED FIM TASK 49-40, TASK 801 A-F, 26D. FAULT CODE 49-41010 DID NOT RETURN. CSS START PASSED.