What was found
PDIS 649 32-30 1914291 13JAN19 PHL CLOSE AFTER TAKEOFF GEAR CONSTANT KNOCKING NOISE HEARD INFRONT AND BELOW FO. IN ADDITION NR 1 HYD PRESSURE FLUCTUATION FROM 2900 TO 3000 PSI. KNOCKING NOISE AT SAME PACE AS PRESSURE FLUCTUATION. FACT 14JAN19 17:28 PHL TROUBLESHOT WITH EMB 145 FIM 32-61-00-810-801-A UP TO STEP 5. FOUND PIN A AT PLUG P0048 DID NOT HAVE ADEQUATE VOLTAGE. R&R UP PROX SWITCH 2 HARNESS ON LT WING AS REQUIRED. ELECTRICAL TEST GOOD. OPS CHECKED IAW AMM 32-30-00 OPS CHECKS GOOD OK FOR SERVICE.