As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS, PNEUMATIC FLUCTUATIONS DURING CLIMB AND APPROACH MODES. RT BLEED SEEMS TO STICK AT 40 PSI UNTIL LEFT BLEED MODULATION COULD UNSTICK IT. BOTH PRSOV EXERCISED AND VISUALLY INSP AND EXERCISED PRSOV ALSO FUNCTION CHECKED OK. AS PER 36-11-00 AND ALSO HIGH POWER ENGINE RUN DUCT PRESSURE CHECKED NORMAL AND NO FOUND FLUCTUATE RT. PRESS ENG RUN BY FLT CREW. AMM 71-00-00 WITH BOTH ENG.