As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO FIELD DUE TO NR 2 ENGINE POWER PROBLEM. DOWNLOAD FROM FLIGHT DATA RECORDER (FDR) FOUND POWER LOSS ON THE NR 1 ENGINE. FOUND NR 1 POSITION SPAR VALVE WIRING W802-002-18 & W802-005-20 SHORTED TOGETHER UNDER CLAMP, 65 INCHES FROM CONNECTOR D5162P AND REPAIRED WIRING. AS PERCAUTIONARY, ACCOMPLISHED NR 1 ENGINE POWER ASSURANCE RUN & ACCELERATION CHECKS.