HNH, I can't agree with any of that. The ONLY reason federal regs are written is to set a standard that anybody can operate to/in/with and be safe. This idea that a major US carrier shouldn't have operated into DCA because it might be dangerous, depending on how the airline assesses it, and is therefore sue-able, when the FAA itself allows it, doesn't gel IMO. The sole job of the regulator is to ensure the airspace and it's procedures will allow a safe operation. In any case, I think what you are suggesting, that AA have worked out, by itself, that operating into DCA is unsafe, won't happen these day because the almighty dollar rules. The minimum standard, set by the FAA, will more often that not, be complied-with. Most company restrictions of the type you mention don't involve simply not doing it, which is what is being suggested here.