Hello all, I'm new here!
On a KC-130T, after replacing filters on all systems on cycle, we noticed a weird noise on the upside while cycling the flaps. Flap movement is smooth at the motor AND the physical surface itself, and the T-Handle has been pushed in and verified with free movement of the nipple, but it makes a weird noise. It sounds almost like a trumpet and a pig squealing at the same time. Its only on the upside and it did it first at 40% flaps, then 30%, then 20% then stopped, then againt a 20% and it continues for a few seconds AFTER the flaps have stopped moving when doing a full cycle from 100% to 0%. This is will all engines running. Any ideas? Maybe the Surge dampener is going bad? but would it make a noise like this??