As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*EMERGENCY DECLARED* LEFT HYDRAULIC PRESSURE INDICATOR (YELLOW BRAKES) WAS INDICATING 3000 WHILE ON CRUISE. INDICATION WENT BACK TO 0 ON FINAL APPROACH. LANDING AND BRAKING WAS NORMAL. R&R BSCU PER AMM 32-42-72. NO HELP. ORIGINAL REINSTALLED. R&R YELLOW SYSTEM TRIPLE PRESSURE INDICATOR PER AMM 32-44-19. OPS CHECK GOOD, GAUGE READS NORMAL.