As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GE REPORTS #1 ENGINE TREND DATA SHOW GRADUAL INCREASE IN DELTA EGT AND FUEL FLOW AND A DECREASE IN DELTA CORE SPEED.(#PRI2) ETOPS SIG. GROUNDED - YES. REMOVED AND REPLACED HPTACC VALVE PER B737-900 AMM 75-21-01. LEAK CHCK AND OPS TEST NORMAL.