Boeing said in a statement received at China's largest air show in Zhuhai that its note to airlines underscored "existing flight crew procedures" created to address circumstances where information coming into the cockpit from the sensors was wrong.
Boeing has issued a warning to airlines using its 737 MAX planes after a sensor failure was identified as a potential cause of the crash of a passenger flight near Indonesia.
A Lion Air 737 Max 8 carrying 189 people dove into the Java Sea at high speed on Oct 29 minutes after takeoff. The committee said the pilots were dealing with an erroneous airspeed indication.
But a Boeing statement said a safety bulletin, sent to airlines on Tuesday, directs flight crews to existing guidelines on how they should respond to erroneous "angle of attack" data.
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 U.S. authorities responded cautiously to suggestions of fleet-wide checks.
Indonesia's Garuda airlines said it hadn't received any bulletins from Boeing either.
The US manufacturer has delivered 219 737 MAX jets to customers globally, its website shows, with 4,564 orders for jets yet to be delivered.
The brand new Lion Air jet that crashed into the sea shortly after taking off from Indonesia's capital city one week ago had an airspeed indicator problem on its four previous flights, investigators revealed Monday. Lion Air said Monday that almost 70 ships have been deployed in the search, with more than 1,000 people involved.
Aviation experts also cautioned that it was too early to tell the exact cause of the crash and that the flight recorder still needs to be fully analyzed.
Capt. Daniel Putut Kuncoro Adi, managing director of Lion Group, said that all information had been handed over to Indonesia's National Transportation Safety Commission, and he could not answer any questions about the fault because of a nondisclosure agreement signed to accommodate the investigation.
The 737 MAX is Boeing's newest and most advanced aircraft series, as well as the company's bestseller. Scores of body bags have been gathered but so far only 14 individuals have been identified.
He said the pilot had landed the plane safely on that occasion.
Indonesian investigators have recovered about 69 hours of flying data of the crashed Lion Air jet during its last 19 trips.
On Thursday (Nov 1), the SAR team found the flight data recorder (FDR) of the aircraft, and now the search focus was on another part of the aircraft's black box, namely, the Cockpit Voice Recorder (CVR).
Indonesian officials said on Wednesday they would extend the search by three days.
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In a separate interview with The Associated Press, she said "Haylee would've never made it if she lost her mother". Ms Schneider said the deaths of her daughter and granddaughter were "still not real for any of us".