As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 2 ENGINE COMPRESSOR STALL AT FLIGHT LEVEL 390 IN CLOUDS. IMMEDIATELY PROCEEDING STALL, ENGINE WAS AT STEADY HIGH POWER AND EXPERIENCED SLIGHT LOSS OF EPR AND STALL. ENGINE RECOVERED AND CONTINUED OPERATING. *S/D* MACH CHAMBER CONTAMINATION WITHIN THE ENGINE VANE AND BLEED CONTROL CAUSED THE EVBC TO FAIL WHICH CAUSED THE ENGINE TO SURGE. EVBC HAS BEEN OVERHAULED.