What was found
NR 2 ENGINE COMPRESSOR STALL AT 90 KNOTS, - ABORTED. CHECKED PS4 AND MOISTURE TRAP IAW 73-20-3. CHECKED AIR FILTER ON FUEL CONTROL UNIT, HAD NO CONTAMINANTS. REPLACED O-RING AND INSTALLED FUEL FILTER IAW MM 73-20-2. PERFORMED FLAG CHECK OF PRBC VALVE, GROUND CHECKS NORMAL IAW 75-30-3. VISUALLY INSPECTED BLEED VALVE FOR DAMAGE AND LOOSENESS, FOUND NORMAL IAW MM 75-30-2. PERFORMED EPR CHECK WITH TEST BOX IAW 77-11-0, FOUND NORMAL. INSPECTED DIFFUSER CASE VISUALLY FOR CRACKS AND LEAKS, NONE FOUND IAW 72-0. PERFORMED ENGINE PERFORMANCE RUN IAW TCA MIP CHAPTER 2.