As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX 2:40 HOURS INTO FLIGHT, LEVEL THREE AIR MANIFOLD 2 FAIL ALERT ILLUMINATED. CLEARED MASTER WARNING AND RAN APPROPIATE QRH LIST. SYSTEM 2 ON THE AIR SYNOPTIC DISPLAYED AS A RED LINE. MANIFOLD 2 MAINTAINED AIR PRESSURE THROUGHOUT REMAINDER OF FLT AND "BLEED AIR 2 OFF" NEVER ILLUMINATED ON THE AIR SYNOPTIC PAGE. A/C DIVERTED INTO CTS. REPLACED DEFECTIVE SENSORS D1-29 AND D1-28. REPLACED MFC PRECAUTIONARY.