What was found
PDX FLIGHT NR 2298 ON ROTATION, RIGHT STALL WARNING ILLUMINATED THEN WENT DARK, A TRU LIGHT ILLUMINATED THEN WENT DARK, AND FINALLY NR 2 AC GENERATOR LIGHT ILLUMINATED AND STAYED ON. WHEN RUNNING NR 2 AC GENERATOR CHECKLIST, THE SAME SEQUENCE OF LIGHTS CAME ON AND OFF WITH FINAL RESULT ONCE AGAIN LEAVING NR 2 AC GENERATOR LIGHT ILLUMINATED. MX INSPECTED RIGHT AC CONTACTOR BOX. FOUND NO DISCREPANCIES. INSPECTED RIGHT BRUSH ASSEMBLY SLIP RINGS CLEANED RINGS, GROUND RAN AIRCRAFT NR 2 AC GENERATOR ONLY MAKING .08 VOLTS THEN CYCLING OFF. REMOVED AND REPLACED NR 2 AC GENERATOR PER AMM 24-21-00, PAGE 401-407. COMPLIED WITH FUNCTIONAL TEST PER AMM 24-21-00, PAGES 501/503. CHECKS GOOD. AIRCRAFT RETURNED TO SERVIC