As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN PERFORMING TASK 292500-16-1 (OPS CHECK OF RAT UPLOCK MECHANISM) DURING A-06 CHECK, RAM AIR TURBINE (RAT) FAILED TO DEPLOY FROM EITHER THE CAPTAINS` AND FIRST OFFICERS` RELEASE HANDLE. AFTER INVESTIGATION IT WAS FOUND THAT THE UPLOCK ROLLER ON THE RAT WAS SEIZED. RAT WAS LAST O/H IN APRIL 2008.