Any ideas on what happened with AA177 on Jan 5? First it was downgauged to a 757. Then, it diverted to DFW! AA cargo says maintenance but I'd be interested in knowing what prompted such an out of the way diversion. ORD would've made more sense. AA18, the SFO-JFK redeye usually uses the inbound 177 but yesterday, a 767-200 arrived from MIA which was turned to be my flight to JFK as AA18. I'm glad that we didn't have to wait for AA177 from DFW otherwise I would've lost my J seat.