Uh, no. 1. The tail came off because they descended at 1,300fpm, undershot the threshold, with throttles at flight idle, and stalled it, striking the tail on the sea wall. The tail didn't just fall off. 2. It also did cartwheels, according to one "eyewitness." Flipped and cartwheels are things that the thick public mistake ground loops for. Of note, ILS, PAPI and glideslope were turned off at SFO yesterday, according to posters on PPrune.