Fuel Dumping in Heavy Thundershower
A few years ago I had an emergency, we lost one engine due to engine fire number 3 on an A340 with TOW 245t. We had to wait for 2hours before departure because of +TS and just in the rotation the engine fire #3 came on. We had overweight for landing and decided to remain at the departure aerodrome, since all the other airports werent much better or would have had similiar weather on ETA there. We began the fuel dumping procedure when we were zick-zacking between the red spots on the radar. The constant lightning left, right and in front kept us from dumping. We decided for the overweight on a very wet runway. All went fine. Later, on the green table, we got told: Airbus said: The fuel dumping in TS with lightning is safe.
I still wouldn´t dump.
Does anyone got experience with that or knows better ?