every once in a while you'll get hosed by an airline. Currently AA is getting squeezed from both ends. Mechanic's union messing with AA to get a new contract and the grounding of their 737s until the FAA approves the fixes -- so less planes as spares if a plane breaks down. On the plus side the mechanics are finding anything and everything to fix -- equals safer flight, but the bad side of it is delayed & cancelled flights.