As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-03 CHECK THE L-2 DOOR DAMPER ASSEMBLY WAS FOUND LEAKING. MAINTENANCE REMOVED AND REPLACED THE L-2 DAMPER ASSEMBLY IAW AMM TASK 52-13-14-400-001, OPERATIONAL CHECK WAS GOOD. VENDOR CONFIRMED FAILURE OF DAMPER CYLINDER ASSEMBLY S/N 280 FINDING LEAKAGE THE FRONT AND REAR CUPS DUE TO WORN SEALS. DETERIORATED SEALS WERE ALSO FOUND ON THE PERCUSSION AND BOTTLE ASSEMBLY. REPLACED ALL WORN PARTS AND COMPLIED WITH S/B'S FE174-52-2 & 3R1, P/N CHANGED TO FE174-004.