The P-3/CP-140 is based upon the Lockheed Electra commercial airliner which had limited success.
iSTR the early Electras had an unfortunate tendency to shed their wings in flight.
Not a great handicap when your competition is Viscounts!
I'd have thought the Comet 1s were a better comparison
I'm not aware of any real deficits in Viscounts, but that is absence of knowlege, not knowledge of absence. (And no, I can't even be bothered to goole it!)
Way back, I flew from Port Hedland to Perth in a Viscount---I was underwhelmed, to say the least!
My only comparison at the time was the Fokker F27, which reached cruising height in hardly any time at all, whilst the Viscount droned on interminably, before it got there.
That was just a "niggle", but I was further soured towards the aircraft, as I had a window seat, & was treated to the delights of poorly overlapped duralumin panels (you could see the gap,)
The wings seemed to flex a bit, too.
Apparently this is common with larger aircraft, but I haven't noticed it to the same extent on other planes since.
I was, at a fairly low level, a bit dubious about the structural integrity of the wing, but dismissed it .
Some months later, the same aircraft, on the same route shed a wing & crashed.