Boeing Co is preparing to send a bulletin to operators of its new 737 Max models warning that erroneous readings from a flight-monitoring system can cause the planes to aggressively dive, said a person familiar with the matter.
Rusdi Kirana, Lion Air's co-founder, was not invited to speak by Transport Minister Budi Karya Sumadi, who moderated the meeting between relatives and the officials who are overseeing the search effort and accident investigation.
"We found the plane's speed indicators was damaged on the previous four flights", KNKT Chairman, Soerjanto Tjahjono, said during a press conference on Monday.
Search teams are still trying to locate the missing cockpit recorder to determine why the almost brand-new Boeing 737 MAX 8 crashed. All 189 passengers and crew are feared to have died when the plane crashed shortly after takeoff on October 29.
Meanwhile, around 137 body bags containing remains of the victims have been taken to the funeral home of the National Police hospital in Jakarta. The cockpit voice recorder has not been located.
Earlier this week, investigators said the plane's flight data recorder showed that an airspeed indicator malfunctioned during last week's fatal flight as well as three previous flights.
Indonesian accident investigators said an airspeed indicator of a Boeing Co 737 MAX plane that crashed last week was damaged for its last four flights, but USA authorities responded cautiously to suggestions of fleet-wide checks.
A Boeing 737 MAX 8 in Indonesia had crashed into the sea shortly after taking off from Jakarta.
However, while that information will be extremely important, the cockpit voice recorder is critical to understanding the pilot's reaction to the problems. He said a faulty airspeed system might have contributed to the crash, but that based on what we know so far, it shouldn't be considered the cause of the crash.
It did not give more details and did not speculate on how the indicator problem may have played a role in the crash, as it continues to mine the flight recorder - seen as key to answering why a almost brand new plane fell out of the sky.
Authorities will be under pressure to release the data as the 737 is one of the world's most widely used planes.
Recent rumors arising among the public say that the fallen Lion Air flight JT 610 that crashed into the waters of Tanjung Karawang on October 29 was due to technical failure. The budget airline has frequently received complaints over safety issues, poor service and unreliable scheduling.
The news was first reported by Bloomberg reported on Tuesday.
"This is a preventative measure.(The accident) is a very expensive lesson for us".
The KNKT added that the FDR's recordings were 69 hours from 19 flights and the last date of recording was from the date of the crash and corresponded with public data available on flight-tracking websites.
Kirana, who is also Indonesia's ambassador to Malaysia, faced the angry audience, with his head slightly bowed and pressed his palms together without saying a word.