Boeing to issue safety advice on 737 MAX after Indonesia crash

Boeing to issue safety advice on 737 MAX after Indonesia crash

A plane owned by low-priced Indonesian airline Lion Air has torn a wing on a runway in Indonesia just days after one of its flights crashed into the Java Sea, leaving 189 dead.

The plane maker said local aviation officials believed pilots might have been given wrong information by the plane's automated systems before the fatal crash.

Lion Air's first two attempts to address the airspeed indicator problem didn't work and for the Boeing 737 MAX 8 plane's second to last flight, the angle of attack sensors were replaced, he said.

The plane plummeted into the Java Sea on Oct 29 en route to Pangkal Pinang from Jakarta, killing all 189 aboard.

Pilots are trained to disengage the angle-of-attack sensors from the plane's computers when they get false readings. "We think this is an issue that is important because there are more than 200 Max planes around the world", Capt. Nurcahyo Utomo, the transportation safety committee's lead accident investigator, told the Times.

The warning is based on preliminary findings from the accident involving a Lion Air jetliner, the person said.

Lion Air is one of Indonesia's youngest airlines but has grown rapidly, flying to dozens of domestic and worldwide destinations.

Indonesian authorities have downloaded information from the flight data recorder that showed a cockpit indicator on the Lion Air jet was damaged for its last four flights.

He said the pilot had landed the plane safely on that occasion.

The system measures the direction of air flow over wings. If the flow is disrupted by a plane going too slow or climbing too steeply, that can cause an aerodynamic stall and a plane will plummet. It is one thing for an engineer to fix a problem once but if the problem persists as it did with this aircraft then there is something far deeper that needs greater attention suggest safety analysts.

He said: "The aircraft nudged the pole while travelling to the runway". Aviation regulators such as the U.S. FAA and the European Aviation Safety Agency often follow such actions by mandating that carriers follow the bulletins. In addition, a system known as elevator trim can be changed to prompt nose-up or nose-down movement. That is enough to send the plane out of control and cause it to fall to the ground.

American said it was issuing similar communications to its pilots to emphasize the existing protocols.

"The pilots can use extra force to correct the nose down trim, but the failure condition repeats itself, so that the nose-down push begins again 10 seconds after correcting", reported The Seattle Times. There were more than 180 people on board.

Related Articles