As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DE/HYD- DECLARED EMERGENCY INTO FAI DUE TO 'A' SYSTEM HYDRAULIC QUANTITY DROPPING. PRESSURE NORMAL. ALTERNATE GEAR EXTEND UTILIZED. CORRECTIVE ACTION: REPLACED LT ENGINE HYDRAULIC PUMP AND 'A' SYSTEM HYDRAULIC PRESSURE MODULE. PERFORMED 'A' HYDRAULIC SYSTEM FLUSH PER B737 AMM. CASE DRAIN FILTER CLEAN. AIRCRAFT RETURNED TO SERVICE.