Indonesia - Boeing 737 with 62 aboard missing, Jan 2021

Lot of details in the final seconds.

After pushing back from the airport's Terminal 2D Gate B1,[5] the aircraft took off from Runway 25R at 14:36 local time (07:36 UTC).[6] The flight took off amid heavy monsoon rain, following a bad weather delay.[7] Due to the significant delay, it was expected to land in Pontianak at 15:50 WIB (08:50 UTC).[5]

Flight 182 was climbing to 13,000 ft (4,000 m) when it abruptly dived, then it suddenly turned to the right.[8] An air traffic controller (ATC) noticed this and asked the pilots what was happening on board, but received no response.[9] According to AirNav Radarbox flight data, the aircraft reported a rapid drop in altitude during the climb phase from 10,900 ft (3,300 m) to 7,650 ft (2,330 m) at 07:40 UTC.[10] Flightradar24 reported that four minutes after takeoff, the aircraft dropped by 10,000 ft (3,000 m) in less than a minute.[11] The flight tracker also noted that the aircraft's last recorded altitude was 250 feet (76 m) at 07:40:27 UTC.[12] According to provided flight data, the airplane experienced a drop of 1,755 ft (535 m) in just six seconds between 07:40:08 and 07:40:14 UTC. It was followed by a drop of 825 ft (251 m) in two seconds, 2,725 ft (831 m) in four seconds, and 5,150 ft (1,570 m) in its last seven seconds.[13] During the fall, the aircraft rapidly changed speed, decreasing and increasing in seconds.[14] Its last contact with ATC was at 14:40 WIB (07:40 UTC) in a location between Laki Island and Lancang Island.[15] The aircraft is presumed to have crashed into the Java Sea near Laki Island and 19 km (12 mi) from Soekarno–Hatta International Airport.[16][17] According to the ATC, there was no distress call during the flight. Indonesian transport officials also stated that the aircraft failed to follow ATC instructions.[18]


Sriwijaya Air Flight 182 - Wikipedia
 
Investigators suspect malfunctioning engine controls and pilot efforts to troubleshoot the problem likely played a major role in an Indonesian airliner’s fatal plunge into the Java Sea earlier this month, according to people familiar with the details.

Information downloaded from the Sriwijaya Air jet’s flight-data recorder, the people said, points to pilots trying to deal with a problem affecting an automatic throttle system on the twin-engine, 1990s-era Boeing Co. 737. The recorder, which is one of the plane’s two black boxes, was retrieved a few days after the crash.

Indonesia Plane Crash Probe Centers on Engine Control Problems
 
One possibility investigators are looking into is the pilots losing control because a malfunctioning throttle was producing more thrust in one of the engines, according to a person familiar with the situation. The device had been having problems on previous flights, the person said.
With the search in its second week, hopes are fading that the cockpit voice recorder — a crucial jigsaw piece in finding out what unfolded — will ever be found.

'Totally Destroyed' Indonesia Jet in Java Sea Makes Search Almost Impossible
 
This article was dated today.

The investigation into last month’s Sriwijaya Air crash in Indonesia is focusing on the engine-control system of the Boeing Co. 737-500 jet, potentially dealing another blow to the U.S. manufacturing giant as it emerges from the global grounding of its 737 Max following two other fatal crashes.

While Indonesia’s National Transportation Safety Committee is still trying to determine the exact cause of the crash, the left engine throttle lever was trimming back the power output just before the 26-year-old jet plunged into the sea, according to a family member who attended a briefing given by the regulator in Jakarta on Tuesday.

“The NTSC hasn’t reached any conclusion on the cause of the crash, but they did say that there was an uncommanded backward movement of the left throttle lever while the autopilot was in operation,” said Rafik Alaydrus, who lost his wife in the disaster.

A person familiar with the investigation told Bloomberg News last month that a malfunctioning automatic throttle was being considered as a reason for the pilots losing control by producing more thrust in one of the two engines. The device had been having problems on previous flights, according to the person. Unequal thrust can cause a plane to roll onto its side and descend abruptly...

Searchers retrieved the flight-data recorder from the jet, but the memory module of the cockpit-voice recorder still hasn’t been found.

Bloomberg - Are you a robot?
 
Boeing Co has issued a technical bulletin to airlines reminding them to ensure pilots closely monitor the airplane's state and flight path to prevent a loss of control in flight, according to two people with knowledge of the matter.

The bulletin was sent after Indonesia issued a preliminary report into a Jan. 9 Sriwijaya Air crash that killed all 62 people on board a 737-500.

It was not explicitly linked to that crash and covers other Boeing models but it addresses one of the potential areas of interest for investigators following the accident, pending the discovery of the cockpit voice recorder memory unit.

Boeing reminds pilots to monitor planes closely following Indonesia crash: sources
 
Thanks @PrairieWind, I've found this to corroborate the good news-

Key Part Of Voice Recorder Found From January's Crash Of Indonesian Airliner

After weeks of scouring the Java Sea, investigators have found a crucial piece of the cockpit voice recorder belonging to an Indonesian jetliner that crashed in January, killing all 62 people aboard.

The cockpit voice recorder, or CVR, from the Boeing 737-500 could shed light on actions taken by the pilots in the minutes between takeoff from Jakarta and the plane's fateful plunge into the sea on Jan. 9.
 

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