The crash occurred Coming_to_be when an incorrectly secured cargo door at the rear of the plane burst open Openness and broke Destroying off , causing Causation an explosive decompression that severed Destroying critical cables necessary to control Control the aircraft .

In the following investigation Criminal_investigation , it was found Know that a similar set of conditions , which had caused Causation the failure of an aircraft floor following explosive decompression of the cargo hold , had occurred Coming_to_be in ground testing Testing in 1970 , before the DC-10 series entered Arriving commercial service Supply .

The rapid decompression in the cargo hold caused Causation a partial collapse of the passenger compartment floor , which in turn jammed Motion or restricted Hindering some of the control Control cables , which led to Causation various flight control Control hydraulic actuators .

according to the official air force report , the aircraft experienced Change_sentiment an uncontrolled decompression that required Preventing_or_letting it to descend to in order to lower the cabin altitude .

on august 12 , 1985 , a boeing unk operating Being_in_operation this route suffered Bodily_harm a sudden decompression twelve minutes into the flight and crashed Catastrophe in the area of mount unk , ueno , gunma prefecture , from tokyo thirty-two minutes later .

japan 's aircraft accident investigation Scrutiny commission officially concluded Process_end that the rapid decompression was caused Causation by a faulty repair by boeing technicians after a unk incident during a landing Self_motion at osaka airport seven years earlier in 1978 .

Cabin pressurization continued to expand Expansion and contract the improperly repaired bulkhead until the day of the accident , when the faulty repair finally failed Earnings_and_losses , causing Causation the rapid decompression that ripped Removing off a large portion of the tail and caused Causation the loss Earnings_and_losses of hydraulic controls Control to the entire plane .