What was found
AIRCRAFT WAS GROUNDED: R4 DOOR DAMPER CYLINDER PRESSURE LOW. WILL NOT HOLD PRESSURE. REPLACED PERCUSSION MECHANISM DIAPHRAGM PER AMM 52-10-00.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: R4 DOOR DAMPER CYLINDER PRESSURE LOW. WILL NOT HOLD PRESSURE. REPLACED PERCUSSION MECHANISM DIAPHRAGM PER AMM 52-10-00.