Alright, here's a summary of all info we gathered, confirmed by online schedule:
- 6/1 - SEA-NRT moves to 747, probably utilizing the two birds currently in maintenance.
- 7/27 - NRT-HNL moves to 2x 747 daily, now just 1x. Back to 1x daily 10/27. Seems like this is the spare bird from NRT.
- 8/18-21 - DTW-ICN moves to 747 daily, requiring 2 birds. DTW-NRT and NRT-BKK move to 747 3-4x weekly (rest using 777). NRT-TPE moves to 747 3-5x weekly (rest using 763).
- 10/1 - DTW-NGO-MNL-NGO-DTW moves to 5x weekly (4x was mentioned but schedule shows 5x).
- 10/26 - NRT-HNL moves back to 1x 747 daily, HNL-KIX moves from 747 to 333.
So seems like the period from 7/27 until 8/18 is the toughest for this fleet, and then DL is letting some routes go.