American Airlines has won regulatory approval to swap flight attendants paper manuals for lighter Samsung tablets in a change that will save nearly $1 million a year, the company said on Wednesday. The move, which does not yet affect attendants at American Airlines Group Incs subsidiary US Airways, comes little more than a year after Americans cockpit went paperless, and is one of many strategies that airlines have pursued to reduce weight and fuel costs. Delta Air Lines and United Airlines have also distributed smart devices to their pilots, and Delta plans to roll out an e-manual for flight attendants starting in October.