While I'm sitting here at HND airport and having a lookout to the tarmac, I've noticed, that on the 787-9 the HF-antenna was missing on the spot, where it is located on the B787-8. After a quick search on google, I found this graphic: https://i.stack.imgur.com/me4UV.jpg
So it seems it was relocated from the leading edge in the middle to the area above the root. Does anyone know the reason for this change? Why did the not use one common design here? And if the -9-design is better, why not use it on newly delivered 787-8?
Airports 2019: FRA, HND, MUC, NUE, STN
Planned 2019: AMD, DEL, DUS, EWR, SIN, TXL