LATAM Chile B789 over Tasman Sea on Mar 11th 2024, upset injures 12

Last Update: March 16, 2024 / 16:52:53 GMT/Zulu time

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Incident Facts

Date of incident
Mar 11, 2024

Classification
Accident

Flight number
LA-800

Aircraft Registration
CC-BGG

ICAO Type Designator
B789

A LATAM Chile Boeing 787-9, registration CC-BGG performing flight LA-800 from Sydney,NS (Australia) to Auckland (New Zealand), was enroute at FL410 over the Tasman Sea when the aircraft encountered an upset causing injuries to 12 people on board. The aircraft continued to Auckland for a landing without further incident. A number of passengers were assessed at the airport, 12 people were taken to a local hospital.

The airline reported the aircraft encountered a technical incident causing strong movement of the aircraft.

Local emergency services reported they assessed about 50 people at the airport and took 12 people to a hospital. One person was in a serious condition.

Passengers reported the aircraft encountered a sudden dive causing passengers to feel weightless and everything not fastened to hit the cabin ceiling about 50 minutes before landing, there was blood at the ceiling. The captain later said they had briefly lost their instrumentation, then it came back all of the sudden.

New Zealand's TAIC as well as Australia's ATSB reported that the investigation will be conducted by Chile's Direccion General de Aeronautica Civil because the accident occurred over international waters. Australian media report that the ATSB sees the accident linked to the risk of flight systems resetting simultaneously.

On Dec 2nd 2016 the FAA had issued their airworthiness directive AD 2016–24–09 summarizing: "We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787–8 and 787–9 airplanes. This AD requires repetitive cycling of either the airplane electrical power or the power to the three flight control modules (FCMs). This AD was prompted by a report indicating that all three FCMs might simultaneously reset if continuously powered on for 22 days. We are issuing this AD to address the unsafe condition on these products."

On Mar 15th 2024 Boeing released a message to operators of all Boeing 787 variants referencing another message sent out in 2017 advising operators to apply adhesives to the rocker (pilot seat movement) switch caps to prevent them from coming loose. The new message states:

Boeing and Flight Deck seat supplier, Ipeco, advise the 787 fleet of a known condition related to a loose/detached rocker switch cap on the fore/aft auxiliary rocker switch. This rocker switch is located on the seat back of both Captain and First Officer seats. Closing the spring-loaded seat back switch guard onto a loose/detached rocker switch cap can potentially jam the rocker switch, resulting in unintended seat movement.

Unintended fore/aft seat movement (due to a jammed seat back rocker switch) can be stopped with the emergency power cutoff switch, or by holding depressed the fore/aft rocker switch located on the inboard side of the seat pan in the direction opposite to the seat movement, or by holding depressed the manual fore/aft control lever on the inboard side of the seat pan to declutch the horizontal actuator. Please note that inputting an opposing fore/aft switch command will stop powered movement only for the duration that the seat software sees opposing commands. As soon as one of the fore/aft switches is released, the seat will resume movement following the remaining command. The preferred option is to shut off power using the power cut-off switch, but if the occupant is not able to reach that switch, the other options will halt the seat powered movement until power can be shut off. Boeing is evaluating potential updates to the appropriate Flight Crew Manual.
Incident Facts

Date of incident
Mar 11, 2024

Classification
Accident

Flight number
LA-800

Aircraft Registration
CC-BGG

ICAO Type Designator
B789

This article is published under license from Avherald.com. © of text by Avherald.com.
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