Indonesia's National Transportation Safety Committee (KNKT) said on Monday an airspeed indicator of a Boeing 737 MAX plane that crashed last week killing all 189 people on board was damaged for its last four flights.
The damage was revealed after data had been downloaded from the plane's flight data recorder, KNKT chief Soerjanto Tjahjono told reporters, adding that it was asking Boeing and U.S. authorities what action to take to prevent similar problems on this type of plane around the world.
"We are formulating, with NTSB and Boeing, detailed inspections regarding the airspeed indicator," he said, referring to the U.S. National Transportation Safety Board.
It was not immediately clear whether the reported problem stemmed from a mechanical or maintenance issue, nor whether U.S. authorities would order any checks.
"We don't know yet where the problem lies, what repair has been done, what their reference books are, what components have been removed," said Nurcahyo Utomo, the KNKT sub-committee head for air accidents.