EDP leak

Here are a few way to diagnose EDP leak:

1. Sticky, slimy fluid observe from the outside of cowling (and u thought it is oil leak)

2. Check tech log for hydraulic servicing history ( normally 10 sectors service 1 quart or less)

3. When condition 1 and 2 establish, you can suspect hydraulic leak in engine, open the cowling and you'll see yellow slimy and sticky fluid splashed all over the pump and IDG (neighbour)

4. Clean the stain, spray developer on the tube join union, housing attachment, and mounting on MGB.

5. Dry spin for leak check.

**example taken from SPL, hydraulic leak through housing, this is not permissible.**

alvin, courtesy of Aaron