As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED THAT THE NR 2 ENGINE WAS SURGING BETWEEN 1.40-1.43 ABOUT ONCE A SECOND. FUEL FLOW FLUCTUATES 100 PPH. ENGINE 2 BLEED PRESSURE 14-38. N1 81.8-83.3. N2 STABLE. N1 VIB 0.7. MAINTENANCE REPLACED THE #2 ENGINE BLEED PRESSURE REGULATOR VALVE CONTROL SOLENOID PER AMM 36-11-55. (AALA202510245726) AND THE #2 ENGINE BLEED PRESSURE REGULATOR VALVE PER AMM 36-11-52. (AALA202510240305) A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED.