As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LVL 1 AIR SYS OFF ALERT. AIR SYS AUTOMATICALLY SHUT OFF NR 3 BLEED AND NR 3 PACK. NR 3 DUCT WENT MOMENTARILY RED PRIOR TO AUTO SHUTDOWN OF NR 3 AIR SYS. CHECKED PNEUMATIC MANIFOLD FAULT INDICATOR IN CAC. NO FAULT BALLS ARE ILLUMINATED. CHECKED AIU'S, PSC'S AND THE MSC. THERE WERE NO FAULTS PERTAINING TO THE NR 3 PNUEMATIC SYS. PERFORMED DECAY CHECK WITH APU IAW AMM 36-00-01, DECAY CHECK PASSED.