A rescue worker (R) holds the second flight data recorder, or known as the "black box", of the crashed CRJ-200 jet, which was salvaged out of the lake in Baotou, north China's Inner Mongolia Autonomous Region, Nov. 24, 2004. A 50-seat short-haul jet CRJ-200, with 47 passengers and six crew members aboard, left Baotou for east China's Shanghai on Sunday morning, but crashed into a lake of the Nanhai Park shortly after it took off.

A rescue worker holds the second flight data recorder, or known as the "black box", of the crashed CRJ-200 jet, which was salvaged out of the lake in Baotou, north China's Inner Mongolia Autonomous Region, Nov. 24, 2004.

The picture taken on Nov. 24, 2004 shows the second flight data recorder, or known as the "black box", of the crashed CRJ-200 jet, which was discovered in the lake in Baotou, north China's Inner Mongolia Autonomous Region, Nov. 24, 2004.

A rescue worker(L) holds the first flight data recorder, or known as the "black box", of the crashed CRJ-200 jet, out of the lake in Baotou, north China's Inner Mongolia Autonomous Region, Nov. 24, 2004.

A rescue worker(R) holds the first flight data recorder, or known as the "black box", of the crashed CRJ-200 jet, out of the lake in Baotou, north China's Inner Mongolia Autonomous Region, Nov. 24, 2004.

A rescue worker holds the first flight data recorder, or known as the "black box", of the crashed CRJ-200 jet, out of the lake in Baotou, north China's Inner Mongolia Autonomous Region, Nov. 24, 2004.

Rescue workers salvage the first flight data recorder, or known as the "black box", of the crashed CRJ-200 jet, out of the lake in Baotou, north China's Inner Mongolia Autonomous Region, Nov. 24, 2004.

The investigation into the plane crash Sunday (Nov. 12) in north China's Inner Mongolia has ruled out human error as a cause of the crash, said Wu Guoqing, a police expert, at a press conference held in Baotou Wednesday.

A 50-seat branch-line jet CRJ-200, with 47 passengers and six crew members aboard crashed into a giant lake of the Nanhai Park in Baotou City shortly after it took off. All 53 people on board and two on the ground were killed.

Editor: Olivia