‘Lion Air crash’, report suggests no fault of pilots, blames faulty sensor
Ethiopian Transport Minister, Ms Dagmawit said, “crew performed all procedures repeatedly that were provided by manufacturer but they were not able to control aircraft.”
Repeatedly followed procedures recommended by Boeing before crash, Flight ET302 crashed after take-off from Addis Ababa, killing 157 people.
It was second crash of a Boeing 737 Max aircraft in five months. Last October, Lion Air flight JT 610 crashed into sea near Indonesia, killing all 189 people on board.
The preliminary report did not attribute blame for crash and did not give detailed analysis of flight.
An investigation into Lion Air flight suggested system malfunctioned and forced plane’s nose down more than 20 times before it crashed into sea.
Preliminary report from Indonesian investigators found that a faulty sensor on aircraft wrongly triggered MCAS without pilots’ knowledge.
Boeing has been working on an upgrade of MCAS software since Lion Air crash.
It has said system can be disabled-allowing pilots to regain control if there appears to be a problem.
But latest comments from Ethiopian officials suggest that pilots could not regain control, despite following procedures recommended by Boeing.
Boeing has issued guidance to pilots on how to manage MCAS.
It plans to install an extra warning system on all 737 Max aircraft, which was previously an optional safety feature.
The 737 Max-family of aircraft was grounded following Ethiopian Airlines crash, a move affecting more than 300 planes.
Despite their efforts, Ethiopian Airlines plane that crashed last month nosedived several times before it hit ground, a preliminary report has said.
Pilots reported, “We are not able to control the aircraft”, Dagmawit Moges said.
But suggested that Boeing to review aircraft control system. She said that aviation authorities should confirm problem to be resolved before allowing 737 Max back into air.
In a statement, Chief Executive of Ethiopian Airlines, Tewolde GebreMariam said that he was “very proud” of pilots’ “high level of professional performance”.
“It was very unfortunate they could not recover airplane from persistence of nosediving,” airline said in a statement.
Investigators have focused their attention on Manoeuvring Characteristics Augmentation System (MCAS)- software designed to help prevent 737 Max from stalling.
The software reacts when sensors in the nose of aircraft show jet is climbing at too steep an angle, which can cause a plane to stall.
It is also revising pilot training to provide “enhanced understanding of 737 Max” flight system and crew procedures, according to report.