China Airlines Flight 358

China Airlines Cargo Flight 358

B-198, the aircraft involved in the accident, 1985.
Accident
Date	December 29, 1991
Summary	Engine detachment due to improper maintenance
Site	Wanli, Taipei
Aircraft
Aircraft type	Boeing 747-2R7F
Operator	China Airlines
IATA flight No.	CI358
ICAO flight No.	CAL358
Call sign	DYNASTY 358
Registration	B-198
Flight origin	Chiang Kai-shek Int'l Airport Taipei, Taiwan
Destination	Anchorage International Airport Alaska, United States
Occupants	5
Passengers	0
Crew	5
Fatalities	5
Survivors	0

China Airlines Flight 358 was a Boeing 747-2R7F freighter that crashed on December 29, 1991 shortly after takeoff from Chiang Kai-shek International Airport in Taipei, Taiwan.

Aircraft

The aircraft was a 747, registration B-198, that had been in service for 11 years, 3 months. The aircraft had clocked a total of 45,868 hours of flight time during its time in service. The last A-check maintenance had occurred on December 21, 1991, and the aircraft had accumulated 74 hours of flight time since that point.

Accident

Several minutes after takeoff, the crew reported problems with the #2 engine, prompting Taipei air traffic control (ATC) to vector the flight into a left turn to return to the airport. Approximately two minutes later, the crew reported that they were unable to turn left, and ATC approved a right-hand turn instead. This was the last radio contact made by the crew. The crew lost control of the aircraft and it struck a hill, right wing first, near Wanli, Taipei. The crash occurred at approximately 3:05 PM, at an altitude of 700 feet. All five crew members died in the crash, and there were no injuries on the ground.

Investigation

The subsequent investigation revealed that the number 3 engine and its pylon had separated from the aircraft and struck the number 4 engine, breaking it off the wing as well. A more detailed investigation revealed that the pylon midspar fittings, which attach the pylon to the lower portion of the wing front spar, had failed. The search for the number 3 engine and its pylon, which landed in the sea, took several months.

Information from the investigation of this crash and the nearly identical crash of El Al Flight 1862 10 months later resulted in Boeing ordering pylon modifications to every 747 in use.

The aircraft was the same one involved in the China Airlines Flight 334 hijacking on May 3, 1986.

See also

• Aviation safety – Metal fatigue
• American Airlines Flight 191 – May 25, 1979 – A DC-10 which also suffered a fatigue-induced pylon failure.
• El Al Flight 1862 - October 4, 1992 – Another 747 which also suffered a fatigue-induced pylon failure of almost exactly the same nature; engine number 3 broke off and hit number 4, breaking it off as well.