As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACCUMULATOR PRESSURE GAUGE IS PART OF STC SA-4378-WP AVIADESIGN INC., HYDRAULIC LANDING GEAR RETRACTION SYSTEM. GAUGE SHOWED NEEDLE STUCK AT 250 PSI WITH ZERO PRESSURE ON SYSTEM DURING AIRCRAFT INSPECTION. SUBMITTER RECOMMENDED A BETTER QUALITY GAUGE BE USED IN SYSTEM.