BOEING 757-223American Airlines, Inc.

A partial loss of engine power shortly after takeoff for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation and the pilot’s failure to maintain airplane control during the unsuccessful attempt to return for landing on the airport. Contributing to the accident was the pilot’s decision to conduct his second takeoff using less than the full runway length available and the airline’s lack of guidance regarding how to respond to en…

a fault in the airplane's AC 1 electrical bus that caused a number of other electrical busses on the aircraft to lose power.

The overheating and arcing of the DC Ground Service Relay and Block Diodes component for undetermined reasons.

The flight crewmembers’ misidentification of the damaged engine (after leveling off the airplane and reducing thrust) and their use of only the damaged engine for thrust during the remainder of the flight, resulting in an unintentional descent and forced ditching in the Pacific Ocean. Contributing to the accident were the flight crew’s ineffective crew resource management, high workload, and stress.

the captain's decision to reject the takeoff after the airplane had rotated. Contributing to the accident was the flight crew's failure to follow standard operating procedures by not verifying that the airplane's flight management computer was properly configured for takeoff and the captain's failure to perform the correct action in response to the electronic centralized aircraft monitoring alert.