As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CLIMBOUT THROUGH FL20, THE LEFT POWER LEVER WOULD NOT RESPOND TO THROTTLE INPUT. SWITCHED THE LEFT EEC TO MANUAL AND THE ENGINE REQUIRED POWER. SELECTED MANUAL ON THE RIGHT ENGINE EEC AND RETURNED TO DEN. REMOVED AND REPLACED LEFT 14,000 FT PRESSURE SWITCH IAW MM 73-23-01. OPS CHECK OF PRESSURE SWITCH GOOD AND ENGINE EEC OPS CHECK GOOD.