The NTSB is asking the FAA to require Part 121 and 135 airlines to incorporate bounced landing recovery techniques in their flight manuals and to teach these techniques during initial and recurrent training. The Safety Board's recommendation stems from several airline accidents, including most recently the May 9, 2004 bounced landing incident that resulted in the crash of an American Eagle ATR 72 at Luis Munoz Marin International Airport in San Juan, Puerto Rico. The captain, who the NTSB said failed to use proper techniques to recover from two bounces and subsequently failed to go around, was seriously injured in the accident. An informal Safety Board survey of six airlines, an airplane manufacturer and a pilot training facility revealed that "only some of the companies included bounced landing recovery techniques in their flight manuals and discussed these techniques during training."