Planning a trip to the Philippines in July 2024: SFO-TPE-CRK. Is there a certain date when BR shifts the schedule of BR27/17 to the 77A/77M layout (from the usual 77B)? Thinking of just doing economy as there are 6 of us if we get the 77A/M layout planes. If still 77B, then i am willing to do premium economy. Thanks.