As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF ON GEAR RETRACTION, "A" SYSTEM HYDRAULIC QUANTITY DROPPED TO 1/2 GALLON. AFTER LOWERING GEAR, QUANTITY SHOWED FULL, THEN WENT BACK TO 1/2 GALLON. GAUGE JUMPED AROUND AFTER LANDING AND WENT TO FULL. SUPPLEMENTAL DATA UPDATE: REPLACED "A" SYSTEM HYDRAULIC RESERVOIR QUANTITY TRANSMITTER. SHOP VERIFIED 'DEAD SPOT' FOUND IN TRANSMITTER.