This will likely change in the next update so it's more configurable, but right now it's in:
/core/common/PilotData.class.php
Towards the end, there's:
<?php
$output = array();
$output[] = $pilotcode.' '. $pilot->firstname.' '.$pilot->lastname;
$output[] = $pilot->rank.', '.$pilot->hub;
$output[] = 'Total Flights: ' . $pilot->totalflights;
$output[] = 'Total Hours: ' . $pilot->totalhours;
You can change that there. To add a new line, do:
$output[] = 'line text';