We're talking about waiting in line for 4 or 5 others to depart full length or leaving immediately off an intersection that is 3000' down the runway. Pilot requested - not ATC. I've seen it in LAS as well with A3 and A4 departures from 25L simply to avoid the line. It's not a direct questioning of safety per se as I don't believe they would request it if the numbers weren't good...I see it more as a reflection of what I perceive to be a cultural 'go getter' mentality that could easily put pilots in a situation that would be highly criticized (regardless of legality) if God forbid something were to happen and that extra runway would have made a difference.
The reason I posted this is not to bash Southwest...it's because this mx inspection debacle has renewed an ongoing curiousity of mine of just how far into the company this perceived 'go getter'
Well...I am a "go getter" but I don't take chances. for the record, I have never requested a departure from A-3 or A-4 while in line for 25L at PHX. Never even considered the performance data for it.
I have, on just a few occasions, used the "U" intersection when departing from 29 at OAK. But the few times I've done it, I knew I had a light acft and plenty of stopping margin.
Without that, I wouldn't even consider it.