As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC YELLOW RESERVOIR LOW LEVEL ON APPROACH. DECLARED EMERGENCY. FOUND LEFT MAIN LANDING GEAR NORMAL BRAKE SERVO VALVE LEAKING FROM FILTER. REMOVED AND REPLACED DEFECTIVE O-RING ON NORMAL BRAKE SERVO VALVE MANIFOLD FILTER CAP PER AMM 32-42-16. OPS CHECKED GOOD.