What was found
ORD - FLT 374 - CLIMBING THROUGH 27,000 FEET, NR 1 ENGINE COMPRESSOR STALLED. EGT FLUCTUATED FROM 1.92 TO 1.97. OTHER ENGINE INSTRUMENT REMAINED STEADY AT N1 89 PERCENT, EGT 500 DEGREES, N2 92 PERCENT. COMPRESSOR STALL CAUSED A SMOKY SMELL TO ENTER COCKPIT, ENGINE BLEEDS SWITCHED BY OPENING BLEED NR 2 AND CLOSING BLEED NR 1 RESULTING IN SMOKY SMELL DISSIPATION AND STABLE ENGINE OPERATION. LANDED ORD WITHOUT INCIDENT. REPLACED NR 1 ENGINE. SYSTEM GROUND CHECKED, NORMAL OPERATION. A 1ST STAGE STATOR RIVET WAS FOUND MISSING ON THE AFT INNER FLANGE AT THE 6:00 O'CLOCK POSITION. THE DEPARTING RIVET DAMAGED ALL STAGES OF THE COMPRESSOR. (X)