SEN - TFS
The schedule as currently published requires five aircraft on some of the days of the TFS flights. In December five aircraft are needed on Fridays though only four on Tuesdays. In April both Tuesdays and Fridays require five. That is the limit of my checking.
Regarding LTNman's point about summer operations on SEN-TFS my view is that they could not be planned without a payload restriction in order to take account of possible high ambient summer temperatures. Unfortunately one cannot be too specific because of the quality of data available to an outsider looking in. Whether an 0630 departure would enable a schedule to be mounted with an acceptable degree of commercial risk might be an interesting consideration.
Are there any current A320 flight crew on this thread who can answer this question: Are A320 Packs Off take offs allowed by current procedures and if so what is the potential gain in RTOW from a limiting runway ?