The Blues' three tries at the Stade Velodrome were scored by centre Jamie Roberts, wing Leigh Halfpenny and lock Bradley Davies.
But after repeatedly opening and closing the latches, flight controllers managed to lock the wing and Discovery was cleared to dock.
Davis, a former Chiefs player, kicked Wasps into an early lead following Christian Wade's exciting run, before Exeter were hampered by injuries to wing Nic Sestaret and lock Peter Short.
Munster duo Keith Earls and Alan Quinlan were surprise call-ups, while Welsh wing Leigh Halfpenny and England lock Simon Shaw also made the squad.
Wing Craig Moir (knee) and lock Jon Phillips (hamstring) are among the serious doubts.
McGeechan is set to name his Lions squad next month with full-back Lee Byrne, flanker Martyn Williams, lock Alun Wyn Jones, wing Shane Williams, props Gethin Jenkins and Adam Jones, scrum-half Mike Phillips, fly-half Stephen Jones and captain Ryan Jones as Wales' front-runners to make the tour.
Ireland originally made two changes with Tommy Bowe returning to the wing for Murphy and Mick O'Driscoll at lock.
Wing Simon Danielli, fly half Dan Parks and lock Scott MacLeod are injury doubts but are expected to be fit.
The wing then combined with Seilala Mapausua to free supporting lock Kennedy, who romped in at the corner to crown a man-of-the-match performance.
Edinburgh were forced into two late changes, with Scott MacLeod replacing Jim Hamilton (knee) at lock, and John Houston coming onto the wing for Andrew Turnbull (illness).
The 6ft 7in, 17st 9lb back started life as a lock and won five caps last year as a wing, but now starts in midfield.
Both scores were engineered by Humphreys, the first courtesy of a fine side-step that allowed the stand-off to release wing Nagusa, who combined well with Tuohy to send the supporting lock over.
He started professional life as a lock at London Irish before former England coach Brian Ashton suggested a switch to wing at Bath, where Banahan moved in 2006.
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