As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PUSHBACK OUT OF MDSD WE TRIED TO START THE RIGHT ENGINE BUT WE COULD ONLY GENERATE 11.6 N2, DUCT PRESSURE WAS 20PSI. MI DUE TO ABOVE @MDSD 1826Z. DEFERRED APU BLEED VALVE ON 10/28 @ 1845Z CAT C, MX PROCEDURES COMPLIED WITH. REMOVED AND REPLACED APU SURGE CONTROL VALVE IAW B-767 AMM 49-53-01 OPS LEAK CHECK GOOD.