As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CFM DIAGNOSTICS REPORTS #2 ENGINE HAS INCREASE IN DELTA EGT, FUEL FLOW AND DECREASE IN CORE SPEED. HPTACC MALFUNCTION IS SUSPECTED. (#PRI2/ETOPS) CNR 20230922006. GROUNDED - YES. (RESOLVED ON W/O: 1970765 TASKCARD: N/R-00001 ) ACCOMPLISHED REMOVALOF HPTACC REF 75-21-01. ACCOMPLISHED STEPS 3A THROUGH G(9) REF AMM75-21-01-400-801-F00 . CONTINUED WITH INSTALL OF HPTACC VALVE REF AMM 75-21-01-400-801-F00 STEPS H TO END OF TASK. OPS AND LEAK CHECK GOOD.