As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLT 25 - NR 3 MANIFOLD FAIL LIGHT CAME ON DURING FLIGHT. FOLLOWED CHECKLIST AND TURNED OFF NR 3 PNEU AND NR 3 PACK. PRESSURIZED PNEU SYSTEM 3. INSPECTED ALL DUCTING FOR LEAKS. NONE FOUND. INSPECTED WIRING TO DETECTORS IN WING, RES SWITCH AND LOOPS. NO DEFECTS FOUND. REMOVED AND REPLACED MANIFOLD FAIL CONTROLLER PER MM 36-23-00. NR 3 MANIFOLD FAIL TESTS NORMAL. (M)