As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT OF AMS, THE NR 1 PNEUMATIC FAIL LIGHT ILLUMINATED FOLLOWED BY SMOKE AND FUMES IN CABIN. FOLLOWED COM PROCEDURES AND SMOKE DISSIPATED WHEN NR 1 PNEUMATIC SUPPLY WAS TURNED OFF. FLIGHT RETURNED TO AMS AND LANDED WITHOUT INCIDENT. TROUBLESHOOTING FOUND NO FAULTS IN THE PNEUMATIC SUPPLY SYSTEM. REPLACED MANIFOLD FAIL DETECTOR UNIT. INSPECTED AND REPLACED CONTAMINATED COALESCER BAGS, OPERATIONAL CHECK OK.