When you are deciding whether or not to take an a/c with a deferred APU in the middle of the summer, keep this in mind...
IF... you taxi out and sit in a money line in Atlanta for 45 minutes, and...
IF... you happen to have a few elderly people and a few infants on the airplane, and....
IF... one of them happens to be succeptible to heat stroke and dies before you can get back to the gate (and this HAS happened... in the airline world... AT ASA... in 2002...)
How are you going to feel about the fact that person died because you caved under pressure to take an aircraft that was unfit for passenger service due to environmental conditions just because somebody put the squeeze on you? If you can get past that sticking point, how do you think the passenger's family's lawyer is going to feel about the fact that you took an aircraft that was unfit for passenger service due to environmental conditions just because somebody put the squeeze on you? I would advise you to ask the ASA captain that this happened to in 2002, but he's no longer here. In fact, he's no longer in the industry, directly because of this event.
SAY NO! I have many times and I will continue to do so any time I feel the environmental conditions inside the aircraft pose a safety hazard to a passenger. I've probably refused an aircraft for an inop APU 10 times since I've been here. I know I've done it twice this summer. I have never so much as heard a peep out of the Chief Pilots office about it.
And another thing.... Flight Control has ZERO authority to tell you to contact a Chief Pilot. If you wish to contact a Chief Pilot for clarification on an issue such as this, I suggest FL or BD. Forget CC, KR, or CV... they WILL NOT back you up. However, just because a Flight Control sector manager (ahem... Stacey Hubachek...) tells you that you have to call a Chief Pilot doesn't make it so. Captains! Start acting like Captains! Make your decisions responsibly and be willing to stand by them. If the Chief Pilots Office wants to discuss your decision with you, I'm quite sure they will call you.
In short... make you decisions with the best interests and the safety of the passengers in mind. If there's a disagreement as to what the proper course of action is, keep in mind that you as PIC trump the dispatcher/sector manager every time (and that's a DIRECT quote from the guy who trains ASA dispatchers...). Joint responsibility is all well and good when it comes to paperwork and planning, but the second that airplane leaves the blocks, it's your ass on the line. Don't be bullied into a violation or a lawsuit. For that matter, don't be bullied into doing something you will personally regret.
Ok, end of my Vodka-induced rant..... almost... Captains... Be F'in Captains. You guys I hear on 131.15 practically begging the dispatcher or Maintenance Control to make a decision for you pretty much make me sick. Use your head, make a decision, CONSULT (don't ask) the appropriate parties, then carry out your decision... It's really that simple.
Oh yeah, and stop F'in taking airplanes with broke APUs in the middle of the summer. Next guy that sticks me with an inop APU in Corpus/McAllen/Houston in the middle of the summer is going to get a Mesaba-style smackdown (courtesy of my F/O, of course... a $20 bribe goes a long way for a first year F/O)