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EXPLAINER: What's next in China Eastern plane crash probe?

EXPLAINER: What's following inside China Eastern flat outside crash probe?

BEIJING (AP) — Even following the finding of the set of two "black boxes," it may exist a lengthy hour dated earlier to investigators figure not here what caused a China Eastern Airlines Boeing 737-800 to nosedive into the ground last week, killing all 132 people aboard.

Searchers found the earliest black carton set of two days following the March 21 crash with every one other accompanied by the following one on Sunday, sextet days later. Experts speak it could lay clasp of weeks or months to break down their contents with every one other accompanied by start to find answers.

WHAT IS A BLACK BOX?

Most commercial jetliners convey set of two recorders to assist investigators try to determine the source of accidents. Despite their name, they are normally orange to build them easier to find.

The cockpit power of speech recorder captures the voices of pilots with every one other accompanied by others inside the cockpit, audio alerts with every one other accompanied by the sound of engines or switches actuality moved. It stores at least set of two hours of sound earlier to starting to record over itself.

Flight facts recorders constantly capture at least 88 pieces of information, including airspeed, altitude, way with every one other accompanied by whether the snout of the flat outside is pointing up, down or level. They tin too record the position of pinion flaps with every one other accompanied by whether the flat outside is flying by autopilot. They normally record 25 hours of data.

Both place an extremity to recording when ability is lost. They are designed to withstand blaze with every one other accompanied by strong impacts with every one other accompanied by normally are installed inside the spine of the cargo compartment. They are equipped accompanied by radio beacons that activate under aqua nevertheless not on land.

Flight recorders used to use magnetic band nevertheless now are digital, which allows them to clasp additional information.

WHAT HAVE INVESTIGATORS FOUND?

Searchers found the cockpit power of speech recorder earliest with every one other accompanied by at that hour dated the flying facts recorder. The set of two orange cylinders, the dimensions of a large, elongated cannister, were dirt-covered. The following one was found under 1.5 meters (5 feet) of soil.

Officials said the exterior of the cockpit power of speech recorder was damaged nevertheless have specified no indeed sign whether the recording was intact. Both will exist examined with every one other accompanied by analyzed inside Beijing.

WHAT CAN THE RECORDERS TELL CRASH INVESTIGATORS?

The recorders tin tell investigators what pilots were doing earlier to a crash, whether they were aware of problems with every one other accompanied by how engines with every one other accompanied by other apparatus were functioning. They are mainly important following disasters such while the China Eastern crash inside which no indeed survivors are found with every one other accompanied by air vehicles controllers heard nothing from the pilots.

In the 2018 crash of a Lion Air Boeing 737 Max inside Indonesia, the flying recorder showed pilots struggled to retain its snout up, fighting an automated system that pushed it down. An Ethiopian Airlines 737 Max crashed inside a similar way quartet months later. The crashes led to the grounding of the plane, which is a different model than the 737-800.

WHAT WILL THE INVESTIGATION LOOK LIKE?

China will lead the investigation. It will include a representative of the U.S. National Transportation Safety Board with every one other accompanied by representatives from Boeing with every one other accompanied by CFM, the General Electric Co.-Safran join venture that made the engines. The NTSB has said that talks were ongoing accompanied by China to address COVID-19 quarantine requirements.

Investigators will look at the plane's maintenance history, the training with every one other accompanied by record of the pilots with every one other accompanied by weather data. They will inspect pieces of the wreckage for clues. Even the dimensions of the debris meadow is important. When wreckage is spread over a extremely large area, it could demonstrate the flat outside was breaking up earlier to hitting the ground.

EXPLAINER: What's following inside China Eastern flat outside crash probe?

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