Air Crash Investigations Loss Of Cargo Door The Near Crash Of United Airlines Flight 811

On February 24, 1989, United Airlines flight 811, a Boeing 747-122, lost a cargo door as it was climbing between 22,000 and 23,000 feet after taking off from Honolulu, Hawaii, en route to Sydney, Australia with 355 persons aboard. As a result of the incident nine of the passengers were ejected from the airplane and lost at sea. The cargo door was recovered in two pieces from the ocean floor at a depth of 14,200 feet on September 26 and October 1, 1990. The probable cause of this accident was a faulty switch or wiring in the door control system. Contributing to the cause of the accident was a deficiency in the design of the cargo door locking mechanisms. Also contributing to the accident was a lack of timely corrective actions by Boeing and the FAA following a 1987 cargo door opening incident on a Pan Am B-747.

On April 6, 1993, a China Eastern Airlines McDonnell Douglas MD-11, flight 583, on its way from Beijing, China, to Los Angeles, California, had an inadvertent deployment of the leading edge wing slats while in cruise flight, not far from Shemya, Alaska. The autopilot disconnected, and the captain was manually controlling the airplane when it progressed through several violent pitch oscillations and lost 5,000 feet of altitude. Two passengers were fatally injured, and 149 passengers and 7 crewmembers received various injuries. The airplane did not receive external structural damage, but the passenger cabin was substantially damaged. The National Transportation Safety Board determined that the probable cause of this accident was the inadequate design of the flap/slat actuation handle by the Douglas Aircraft Company that allowed the handle to be easily and inadvertently dislodged from the UP/RET position, thereby causing extension of the leading edge slats during cruise flight.

On June 1, 1999, at 2350:44 central daylight time, American Airlines flight 1420, a McDonnell Douglas DC-9-82, crashed after it overran the end of runway 4R during landing at Little Rock National Airport in Little Rock, Arkansas. The flight originated from Dallas/Fort Worth International Airport, Texas. There were 145 persons on board. The airplane was destroyed by impact forces and a postcrash fire. The captain and 10 passengers were killed; 120 crewmembers and passengers received serious or minor injuries; and 24 passengers were not injured. The National Transportation Safety Board determines that the probable causes were the flight crew's failure to discontinue the approach when severe thunderstorms.

On 17 July 2014, at 13.20 a Boeing 777-200 with the Malaysia Airlines nationality and registration mark 9M-MRD disappeared to the west of the TAMAK air navigation waypoint in Ukraine. The aeroplane impacted the ground in the eastern part of Ukraine, near the villages of Hrabove, Rozsypne and Petropavlivka. All 298 persons on board lost their lives. The in-flight disintegration of the aeroplane near the Ukrainian/ Russian border was the result of the detonation of a warhead. The weapon used was a 9N314M-model warhead carried on the 9M38-series of missiles, as installed on the Buk surface-to-air missile system. But was MH17 really hit by a 9N314M model war head mounted on a 9M38 series missile? Careful examination of the available facts show that the conclusion of the Dutch Safety Board (DSB) are questionable to say the least. The report is a mixture of an air crash investigation and a criminal investigation.

The Boeing 737 has a history of rudder system-related anomalies, including numerous instances of jamming. A number of accidents and incidents were the result of the airplanes' unexpected movement of their rudders. During the course of the four and a half year investigation of the crash of USAir Flight 427 near Aliquippa, Pennsylvania, killing 132 people, the NTSB discovered that the PCU's dual servo valve could jam as well as deflect the rudder in the opposite direction of the pilots' input, due to thermal shock, caused when cold PCUs are injected with hot hydraulic fluid. This finally solved the mystery of sudden jamming of the rudders of this aircraft.

During takeoff from runway 02 at Tamanrasset Aguenar aerodrome in Southern Algeria, on Thursday 6 March 2003, the left engine of a Boeing 737-200 from Air Algerie suffered a contained burst. The airplane swung to the left. The Captain took over the controls. The airplane lost speed progressively, stalled and crashed, with the landing gear still extended, about one thousand six hundred and forty-five meters from the takeoff point, to the left of the runway extended centerline. The crew of six and 96 of the 97 passengers were killed in the accident. The accident was caused by the loss of an engine during a critical phase of flight, the non-retraction of the landing gear after the engine failure, and the Captain, the PNF, taking over control of the airplane before having clearly identified the problem.

On July 17, 1996, about 2031 eastern daylight time, Trans World Airlines, Inc. (TWA) flight 800, a Boeing 747, crashed in the Atlantic Ocean near East Moriches, New York. TWA flight 800 was a scheduled international passenger flight from John F. Kennedy International Airport (JFK), New York, New York, to Charles DeGaulle International Airport, Paris, France. All 230 people on board were killed, and the airplane was destroyed. The weather was good. The National Transportation Safety Board determines that the probable cause of the accident was an explosion of the center wing fuel tank, resulting from ignition of the flammable fuel/air mixture in the tank. Contributing factors to the accident were the design and certification concept that fuel tank explosions could be prevented solely by precluding all ignition sources and the design and certification of the Boeing 747. The safety issues in this report focus on fuel tank flammability.