As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT HYD QTY W/HYD QTY LOW IND. FOLLOWED CK LIST PROCEDURES AND LOST LT HYD PRESSURE W/GOOD QTY. ZERO LEFT HYD PRESSURE W/GOOD RIGHT HYD PRESSURE AND GOOD QUANTITIES. WHEN XFER PUMP TURNED ON PER MCC. QTY RETURNED TO 19 QTS WITHOUT PRESSURE. FWD B-NUT LOOSE AT LT THRUST RVSR CONTROL VALVE. REPLACED HYD PRESS LINE THAT RUNS FROM ACCUMULATOR TO CONTROL VALVE. CHECK OF EDP CKS GOOD, LEAK CKS GOOD.