Lion Air: Sensor was replaced day before crash but problems persisted

09 November, 2018, 17:52 | Author: Mary Valdez
  • Parts of an engine of the ill-fated Lion Air flight JT 610 are recovered from the sea during search operations in the Java Sea

The warning is based on preliminary findings from the accident involving a Lion Air jetliner, the person said.

United Technologies Corp. supplies the angle-of-attack sensors and indicator for the 737 Max, according to Airframers.net. If a plane flies too slowly it can stall while if it flies too fast it can break up.

On Monday Nov. 5, CNN published an update on the crash investigation from Capt. Nurcahyo Utomo of Indonesia's National Transportation Safety Committee (KNKT) noting that the FDR review also concluded that the aircraft's airspeed indicator had been malfunctioning on four consecutive flights prior to the crash.

Indonesia authorities extended on Wednesday a search for victims of a plane crash last week, when all 189 on board a Lion Air flight were killed, and for the aircraft's second black box, the cockpit voice recorder. They were flown to the capital later Wednesday evening aboard a different aircraft.

In a statement released by Boeing on Tuesday it "issued an Operations Manual Bulletin (OMB) directing operators to existing flight crew procedures to address circumstances where there is erroneous input from an AOA sensor".

Boeing's safety bulletin also instructs flight crews on the potential malfunction, and the ways in which pilots should respond should the error occur.

There were 178 adult passengers, one child, two infants, two pilots and six cabin crew on board.

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Flight JT633 was due to depart Fatmawati SoekarnoAirport in south-western Sumatra for Jakarta's Soekarno-Hatta International Airport at 6.20pm local time.

"Uncommanded" means an action that isn't initiated by the pilots-that is, an action taken independently by aircraft systems (the stabilizer trim system, in this case).

But he said search teams from the military, police and others would stand down, leaving just his agency to press on.

Pilots raise and lower the nose of Boeing jetliners by pushing and pulling on a yoke in the cockpit, which controls panels at the tail known as elevators.

For a safe climb-out, the aircraft's nose is pitched up at a small angle. In the early days of the jet age, the pitch trim system was linked to several accidents.

Boeing issues an operational update for 737. The angle of attack affects the aerodynamics, and the aircraft will pick up airspeed.

The Lion Air 737 Max 8 speared into the coastal waters off Java on October 29, just 13 minutes after takeoff. It has been expanding aggressively in Southeast Asia, a fast-growing region of more than 600 million people.

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