What was found
ATW - FLT 557 - AIR FRAME VIBRATION NOTICED WHEN GOING THROUGH 240 KNOTS, AND IT INCREASED WITH INCREASING AIR SPEED. MAINTENANCE FOUND LEFT INBOARD LIFT SPOILER TRAILING EDGE UP APPROXIMATELY .75 INCH. REPLACED LIFT SPOILER ACTUATOR.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ATW - FLT 557 - AIR FRAME VIBRATION NOTICED WHEN GOING THROUGH 240 KNOTS, AND IT INCREASED WITH INCREASING AIR SPEED. MAINTENANCE FOUND LEFT INBOARD LIFT SPOILER TRAILING EDGE UP APPROXIMATELY .75 INCH. REPLACED LIFT SPOILER ACTUATOR.