Boeing: Lion Air, US pilots say agency withheld data on airplane mannequin that crashed


A prime Lion Air official informed CNN that the handbook for Boeing’s 737 MAX 8 — the mannequin that crashed into the Java Sea final month, killing all 189 on board — didn’t embody a warning a few crucial characteristic that might trigger the airplane to dive.

Zwingli Silalahi, the Indonesian airline’s operational director, stated the handbook didn’t inform pilots that in sure conditions, the airplane’s stall-prevention system may robotically set off a response, akin to decreasing the airplane’s nostril, to forestall or exit a stall.

“We do not have that within the handbook of the Boeing 737 MAX 8. That is why we do not have the particular coaching for that particular scenario,” Zwingli stated Wednesday.

Investigators are inspecting whether or not a sensor on the skin of the airplane transmitted incorrect knowledge that might have triggered the stall-prevention system.

The airline’s claims come after Boeing was similarly accused Tuesday by the Allied Pilots Association (APA) of withholding details about the potential hazard of the airplane’s new options.

Lion Air Flight 610 crashed shortly after taking off from the Indonesian capital of Jakarta on October 29. Investigators imagine the MAX Eight airplane could have skilled issues with a number of sensors.

Boeing stated final week {that a} security bulletin issued to plane operators within the wake of the crash was merely meant to bolster current procedures. Each Lion Air and the APA have now rejected the corporate’s assertion.

“They (Boeing) did not present us all the information we depend on after we fly an plane,” Capt. Dennis Tajer, a spokesman for the APA group, informed CNN on Tuesday. “The bulletin shouldn’t be reaffirming, it is enlightening and including new data.”

Zwingli added that Boeing’s security bulletin didn’t recommend extra coaching for pilots working that plane. “We did not obtain any info from Boeing or from regulator about that extra coaching for our pilots,” he stated.

Zwingli stated that if the results of the continuing investigation — performed by Indonesia’s Nationwide Transportation Fee, the US Nationwide Transportation Security Board, and Boeing — discovered that extra coaching was essential, Lion Air pilots would undertake it.

On Wednesday, a Boeing spokesperson stated in an e-mail that it couldn’t “focus on specifics of an ongoing investigation” and that the corporate had “supplied two updates for our operators world wide that re-emphasize current procedures for these conditions.”

“We’re assured within the security of the 737 MAX. Security stays our prime precedence and is a core worth for everybody at Boeing,” the spokesperson stated.

Fiancée of Lion Air crash victim takes wedding photos alone

The pinnacle of the Directorate of Airworthiness and Plane Operations (DOAAO) on the Indonesian Transportation Ministry informed CNN that the company was within the strategy of intensive discussions about extra coaching for the pilots who fly the MAX Eight planes, however didn’t elaborate on what any extra coaching would contain.

On Tuesday, the APA stated whereas there have been no rapid security issues concerning the MAX Eight planes, “the truth that this hasn’t been informed to pilots earlier than calls into query what different data ought to we find out about this plane.”

“What appears to have occurred right here is {that a} new model or a modified anti-stall capability was added which pushes the nostril down robotically. If it is true, it’s past comprehension that Boeing didn’t inform the airline and pilots about this,” stated CNN aviation correspondent Richard Quest.

He added that if essential info hadn’t been communicated to pilots, it will be a matter for aviation regulators, reasonably than particular person airways.

“The difficulty is how a lot info to present the pilots concerning the programs on board to allow them to reply in an emergency,” Quest stated, including that pilots are sometimes overloaded with readouts and alerts from a number of units and screens that may danger distracting them on the worst attainable second.

Lion Air sensor changed

Boeing’s operational bulletin, launched final week, pointed airways to “current flight crew procedures” to deal with any misguided readings associated to “angle-of-attack” (AOA) sensors.

An AOA sensor is an instrument, just like a small wind vane, that sits exterior the airplane just under the cockpit and sends info to its computer systems concerning the angle of the airplane’s nostril relative to the oncoming air. The sensor helps to find out whether or not the airplane is about to stall and dive.

The US Federal Aviation Administration (FAA) later issued its personal directive that suggested pilots about how to reply to comparable issues.

Final week, investigators stated the AOA sensor on board the plane had been changed the day earlier than the incident, however issues continued.

Indonesian authorities confirmed final Wednesday that the AOA sensor was changed after a flight from Manado, in North Sulawesi, to Denpasar, Bali, on October 28. The Boeing 737 MAX Eight then made one other flight to Jakarta that very same day, and the pilots reported additional issues.

Investigators stated the jet skilled issues on its final 4 flights — together with, crucially, the flight that crashed, in line with Soerjanto Tjahjono, the top of Indonesia’s Nationwide Transportation Security Committee (KNKT).

The FAA’s directive impacts 246 Boeing 737 Max plane worldwide, with 45 of those operated by US carriers that embody Southwest, American and United Airways.

Voice recorder nonetheless lacking

Greater than two weeks after the crash, authorities are nonetheless looking for the airplane’s cockpit voice recorder (CVR), which is believed to be buried beneath deep mud. If discovered, it ought to reveal what occurred within the cockpit within the closing seconds of the flight.

Investigators are already inspecting the flight knowledge recorder (FDR) that was pulled off the seabed, some 30 meters beneath water, on November 1. Preliminary findings recommended there have been issues with the airspeed indicator on the previous three flights earlier than the crash.

Doomed Lion Air plane's air speed indicator was malfunctioning for last four flights

The airspeed indicator is sort of a speedometer and tells the pilot how briskly the airplane is shifting via the air. It does this by gathering knowledge from the airplane’s pitot tube and the static port, which basically examine differentials within the air stress to reach on the airplane’s velocity and altitude.

After issues have been reported with the airspeed indicator, the AOA sensor was changed by a Lion Air technician in Bali earlier than the airplane departed for Jakarta on its penultimate flight.

Passengers on that flight informed CNN that the airplane skilled a big drop in altitude shortly after takeoff. “After 10 minutes within the air the airplane dropped as if it was shedding energy. Individuals panicked. It dropped about 400 toes,” passenger Robbi Gaharu stated.

As soon as in Jakarta, a Lion Air technician checked the airplane once more and gave it the inexperienced mild to fly on its closing flight, from Jakarta to Pangkal Pinang.

Rene Marsh contributed to this report from Washington. Sandi Sidhu and James Griffiths contributed to this report from Hong Kong.

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