I feel like I could've used your support yesterday! As we were boarding our EasyJet flight home, one of the engines was starting up (moving slowly) and it sounded like something was causing a "pinging" noise (not sure if I described that right), as if something was caught in it. Think of like a bike wheel with something clanging against the spokes (like a playing card).As we were climbing up the stairs, my mate said "that doesn't sound right" and my husband instantly glared daggers at him but it was too late...I said "no...nope...it really doesn't.... I don't like this..."
We mentioned to the flight staff and they said it was normal. I'm not so convinced lol. I feel like out of anyone, you would know....Thoughts?
Also, KF - hows the girl?
Yes, this is normal. You would be surprised at how little effort is required to turn a jet engine. I've done it with my little finger on a GE CF6 we had back in my old university lab. The CF6 was the Engine of choice for the MD DC-10 and MD-11 aircraft from way back in the glory days. It gives you an idea of just how efficient these Engines are (don't get me started in the enviromentalists, I hate them too lol).
The wind will very easily turn an engine on the stand. The clicking you can hear is the gearing between the fan blades and the low speed compressors within the Engine core. Nothing to worry about at all. It's a bit like pedalling a geared bike backwards, same sort of thing you can hear just on a larger scale.
Hope that helps. Also, single engine failure would be quite unlikely to result in catastrophe. It could but a lot else would need to go wrong first...
Sent from my SM-G955F using Tapatalk