As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHROME PORTION OF PISTON IS POROUS ALLOWING HYDRAULIC FLUID TO WEEP OUT. INSPECTION WITH 10X GLASS REVEALS TINY PORES AND CHECKS IN CHROME SURFACE. PISTON WAS MAGNAFLUXED DYE PENERANT INSPECTION WITH NEGATIVE CRACK INDICATIONS. SUBMITTER SUSPECTED DEFECT IN CHROMING PROCESS ALLOWING FLUID TO PASS BETWEEN STEEL BARREL AND CHROME SURFACE. ASSEMBLY MFG DATE 12-11-89.