As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THRU FL190, HYDRAULIC SYSTEM -A- QUANTITY INDICATED ZERO (PRESSURE GOOD AT 3000 PSI). COMPLIED WITH QRH. AFTER 15 MINUTES AND BEING LEVEL AT 12,000 FOR OVER 5 MINUTES. HYD SYSTEM -A- QUANTITY SLOWLY BEGAN MOVING TO 6.0 GALLONS AND THEN 5.5 GALLONS. MANUAL GEAR EXTENSION WAS COMPLETED PER QRH. REMOVED AND REPLACED SYSTEM -A- HYD QTY TRANSMITTER REF 29-33-001-4, OPS CHECK GOOD.