As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SPEED BRAKE RETRACTION CHECK, THE LEFT THROTTLE WAS ADVANCED FORWARD AND THEN BROUGHT BACK TO IDLE. THE LEFT ENGINE THEN SPOOLED DOWN. FUEL FLOW WAS STILL PRESENT ON GAUGES DURING SPOOL DOWN. TIGHTENED LOOSE AFT BOLT ON FFDU+FCU INTERCONNECT ROD AND RESET TENSION ON FLOW DIVIDER VALVE DETENT BALL ON LT ENGINE. RIGGED AND OPERATION CHECKS GOOD PER P AND WC JT15D-5A MM 73-10-04 AND 71-00-00.