What was found
PDIS 637 29-10 2744641 27FEB22 PHL CLOSE AFTER TAKEOFF CLIMBING THROUGH 500 FEET EICAS ADVISORY MESSAGE HYD 1 QTY LO. AROUND 10000 FEET A LOUD WIND/HUMMING NOSIE HEARD. RTF. 31082 00 PCS FACT 27FEB22 12:38 PHL PERFORMED GVI OF NOSE LANDING GEAR AND REST OF THE AIRCRAFT DIDN'T FOUND ANY OBVIOUS DEFECTS. SERVICE HYD SYSTEM #100 IAW AMM 12-13-01 AND SWUNG GEAR IAW AMM 32-30-00. OPS CHECK AND LEAK CHECK GOOD. COULD NOT DUPLICAT AIRCRAFT OKAY FOR SERVICE.