As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT AT FL200 WITH ENGINE ANTI-ICE TURNED ON AND AUTO THROTTLES ENGAGED RT ENGINE ADV TO FULL POWER AND LT ENGINE REMAINED AT IDLE. N1 COMMAND BUG SHOWED FULL POWER REQUESTED ENGINE STAYED AT IDLE. MAINT FOUND FUEL LINE CONN AT FUEL FLOW METER LOOSE AND LEAKING. REINSTALLED MOUNT BOLTS AND SAFETIED PER M/M. MOTORED ENG NO FURTHER LEAKS RAN ENG PER PFHB IND NORM.