As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX 200 MILES OUT OF BAHRAIN AT FL 330 NR 4 ENGINE COMPRESSOR STALLED IN CLEAR WEATHER, FOLLOWED BY DROP IN EPR FROM 1.65 TO 1.15. ALL OTHER PARAMETERS NORMAL, ABOVE 85 PERCENT N2 ENGINE SURGES. AIRCRAFT LANDED WITHOUT INCIDENTS. POST FLIGHT INSPECTION REVEALED PARTICLES OF METAL LAYING IN THE BOTTOM OF NR 4 ENGINE TAILPIPE. AIRCRAFT PREPARED FOR THREE ENGINE FERRY. REMOVED AND REPLACED NR 4 ENGINE IAW ARROW AIR J/C 6519 & 6522 ENGINE RUN SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.