As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: UPON SETTING TAKE OFF FLEX # 2 ENGINE TARGET IS 2 % LOWER THAN # 1 ENGINE ALL OTHER PARAMETERS NORMAL. MAINTENANCE FOUND #1 ENGINE PS12 LINE LOOSE / LEAKING AND REPLACED IT PER AMM 72-23-00. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.