As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS GAUGE IS PART OF STC-SA4378WP. AVIADESIGN, INC., HYDRAULIC LANDING GEAR RETRACTION SYSTEM. GAUGE FAILED INTERNALLY - CONNECTING ARM EYELET BROKE OFF CAUSING NEEDLE TO SPRING LOAD TO MAXIMUM INDICATION. SUBMITTER RECOMMENDS A BETTER QUALITY GAUGE BE USED IN SYSTEM.