As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAP FAILURE AT 0. AIRCRAFT DIVERTED BECAUSE OF SNOW CONTAMINATION IN BOS. A/C FERRIED TO MX BASE. MX RETRIEVED CODES, CHECKED TORQUES ON FLAP DRIVE SYSTEM (GOOD), DETAILED INSPECTION OF FLEXIBLE DRIVE SHAFTS. REMOVED AND REPLACED TEFLON SEALS, CLEANED AND LUBED. SAFETIED FLEX SHAFTS AND RIGGED INBOARD FLAP.