That kind of diversion is very common for a new type entering service. The crew doesn't have a lot of time in the type, they know MX doesn't have a ton of time working on the type, and so their default when anything seems amiss is to get the plane on the ground and have it looked at.

The diversion rate right now for the 787 is enormous, but nearly all the diversions are "abundance of caution" calls by the crew.

gonna cost a lot of money and inconvenience a lot of passengers. if a non-emergency, wouldn't they loop in dispatch and maybe a Boeing engineer before turning it around? makes you think, better to wait til they work out kinks before taking one.

Can't work out all the bugs without running the thing you built.

yeah, I hear you. it's just, I don't know that they turn the plane around just because the 'check engine' light came on... and whether it's an abundance of caution or not, for myself, sounds like a situation I'd rather avoid as a passenger.

"When it rains it pours."

Re: lithium

Yesterday I was just charging the lithium battery for a new RC Chopper I had purchased which was sitting in the outer office. I heard a large pop almost like a gun went off. Ran out and the battery had exploded! Only used it one time (was on the 2nd charge).

I then measured the temperature with an infrared sensor and it read 216degees F in the exposed part that I got a reading off of (varied between about 160 and 216 depending on where I probed).

Now I can't fly until they send me a new batter and charger which they have to do by ground because the batteries can't be shipped by air.