As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAILED TO START AFTER TWO ATTEMPTS, REPEAT WRITE UPS(<P>TRANSFERRED TO MDDR 148462 IAW MEL 49-11-01A, CAT C, DUE DATE 22JUN21.</P> / <P>17JUN21 - 1341786 - ITEM# 2 - MEM - REMOVED AND REPLACED APU BATTERY IAW B767-300 AMM 24-31-04. OPS TEST GOOD. 6X GOOD STARTS. THIS CLEARS MDDR 148462. MCC NOTIFIED.</P>)