"Is this fatal? NTSC wants to explore this", Tjahjono said.
The airline said at the time that it had 61 "firm orders" for the planes.
The agency said it would probe what caused the indicator problem and whether proper repairs were done - including replacing the faulty component, he added.
It has not been determined whether those incorrect readings played any role in the October 29 crash.
As details have trickled out following the tragic Lion Air Flight 610 crash in Indonesia last week, one thing has become clear: the crew likely had an unbelievably confusing and desperate situation on their hands. They are now combing the seas for the voice recorder.
Lion Air Corporate Communications Strategic Danang Mandala Prihantoro delivered apology over the incident.
"We don't know what the crew knew and didn't know yet", Cox said. "We have even received an apology from the airport and the AMC officer". They made a decision to fly on to Jakarta at a lower-than-normal altitude.
Certainly, Indonesian search and rescue officials had trouble locating the wreck, despite encountering a large amount of wreckage in the four days leading up to the discovery of the fuselage.
"We are not flawless human beings", he said, sobbing.
On the basis of the Oct 28 flight, Indonesian investigators said they'd provided recommendations to Boeing for distribution to airlines around the world about how to deal with a similar situation.
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All were found to be airworthy although two required repairs for "minor" problems.
Lion Air spokesman Danang Prihantoro said all 143 passengers and seven crew were safe.
The accident has resurrected concerns about Indonesia's poor air safety record, which until recently saw its carriers facing years-long bans from entering European Union and United States airspace.
Boeing's newly issued bulletin focuses on the 737 MAX's angle-of-attack sensors, or AOA sensors, which are supposed to provide data about the angle at which wind is passing over the airplane's wings. A separate procedure involving a specific sequence of actions can be used to disengage the sensor from feeding information to the plane's computer system to address the issue for the duration of a flight.
The Lion Air jet that crashed reportedly had issues with its "angle of attack" sensors. There were no survivors.
United said: "We are in receipt of a Flight Crew Operations Manual Bulletin, issued by Boeing, which applies to the 16 737 Max 8 aircraft now in our fleet".
But the preliminary result of the investigation will only be known at the end of November.
A search for the cockpit voice recorder, the second so-called black box, remains underway.
Indonesia's Ministry of Transport said on Thursday that it would be investigating the cause of the incident and taking follow-up measures.
A Lion Air plane, which was carrying 145 passengers, was forced to abort its take-off after its left wing crashed into a pole.