What was found
ALASKA AIRLINES LEAP-1B ESN 60A682 WAS REMOVED IN JAN 2025 AT ETSN/ECSN 10,132 FH / 2,895 FC FOR SB 72-0394 HPC STAGE 2 SEAL HONEYCOMB. ON OCT 15TH, 2025 (16:38 LOCAL TIME), ESN 60A682 EXPERIENCED A TEST CELL STALL/SHUTDOWN AT VILLAROCHE “MRO” TEST CELL DURING OUTBOUND TEST POST SV AT SQY. THE MALFUNCTION OCCURED AT THE END OF BREAK-IN SEQUENCE @4086RPM. PERFORATION OF CASE AROUND THE HPT SECTION IS REPORTED WITH DEBRIS (SUSPECTED TO BE PIECES OF MIDSEAL) HAVING EXITED THE CASE AND FOUND INSIDE THE COWLS. NO COWLS PERFORATION REPORTED. BOROSCOPE INSPECTION REVEALED EXTENSIVE DAMAGE IN HPT SECTION (BLADES, NOZZLES, MIDSEAL. THE ROOT CAUSE OF THE FAILURE IS NOT DETERMINED AT THIS JUNCTURE. A TECHNICAL INVESTIGATION AND AN 8D QUALITY ANALYSIS WILL BE INITIATED ON MONDAY 12 OF MAY.