Boeing said in its statement that it had issued an operations manual bulletin (OMB) to 737 Max operators that advised flight crews to turn to existing procedures "where there is erroneous input from an AOA sensor".
The finding was announced shortly after an emotional news conference in which victims' relatives confronted government officials and Lion Air's co-founder, calling for accountability.
He added that the seat belt sign was on the for the entire duration of the one and half hour flight.
Rescuers use a crane to retrieve part of the landing gears of the crashed Lion Air jet from the sea floor in the waters of Tanjung Karawang, Indonesia, Sunday, Nov. 4, 2018. The spokesman said the instruments were examined by a maintenance crew between the penultimate and final flights.
He said, "Up until now I believed that my daughter would be found safely but if God decided differently and my daughter is found dead or not even found then as a father I would sincerely accept it".
"The pilot's success became our reference to give a recommendation to Boeing so they could issue an advice for other airlines to follow the same procedures if the same situation occurs", Soerjanto said.
Indonesian officials said on Wednesday they would extend by three days the search for bodies.
"We are not ideal human beings", he said, sobbing.
"Whether the trouble came from its indicator, its measuring device or sensor, or a problem with its computer".
"We are formulating, with NTSB and Boeing, detailed inspections regarding the airspeed indicator", he said, according to Reuters. A problem with the airspeed system should not result in a crash under most circumstances, according to safety experts.
All 189 on board were killed.
Representatives of 737 MAX operators, Singapore Airlines Ltd (SIAL.SI) offshoot SilkAir, Garuda Indonesia (GIAA.JK) and Canada's WestJet Ltd (WJA.TO), said they had not yet received a bulletin from Boeing.
While search teams scouring the waters managed to bring up the flight data recorder, a separate recorder that captures cockpit conversations and background noise is still buried in the seabed where the plane plunged. The cockpit voice recorder has not been located.
The search effort has involved 151 divers, five helicopters, 61 ships, ranging from fishing boats to ships with advanced sonar scanners, as well as underwater drones.
Ony Soerjo Wibowo assessed that a commercial aircraft could indeed experience technical failures despite having gone through periodic checks as the Lion Air crash suggests.
Another relative demanded that a detailed enquiry be conducted in the case which should continue even after the KNKT concludes its investigation or after the airline has compensated victims' families.
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