As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AS AIRCRAFT LEVELING AT FL 350 THE POWER REDUCTION CAUSED HEAVY COMPRESSOR STALLS IN THE NUMBER ONE ENGINE. LARGE FLUCTUATION IN N1, EGT, N2, AND FUEL FLOW. RAN NR 1 ENGINE PER MM 71-00-87 TO TAKEOFF POWER FOR THREE MINUTES, REDUCED POWER. NO STALLS NOTICED. CHECKED BLEED SCHEDULE. TESTS PERFORMED SEVERAL TIMES WITHOUT FAULTS.