Posted on 01/08/2024 12:57:06 PM PST by george76
The cockpit voice recorder data on the Alaska Airlines Boeing 737 MAX 9 jet which lost a panel mid-flight on Friday was overwritten, U.S. authorities said, renewing attention on long-standing safety calls for longer in-flight recordings.
National Transportation Safety Board (NTSB) chair Jennifer Homendy said on Sunday no data was available on the cockpit voice recorder because it was not retrieved within two hours - when recording restarts, erasing previous data.
The U.S. requires cockpit voice recorders to log two hours of data versus 25 hours in Europe for planes made after 2021.
The industry has been wrestling with the length of cockpit recordings since the disappearance of a Malaysian jet in 2014.
Although the Boeing 777 has never been found, the loss of MH370 sharply increased efforts to monitor the longest possible modern flights and where necessary recap earlier flights.
In 2016, members of the United Nations' aviation agency, the International Civil Aviation Organization (ICAO), recommended a 25-hour recording on planes manufactured from 2021, in line with the period of time already used for keeping flight data.
"There was a lot going on, on the flight deck and on the plane. It's a very chaotic event. The circuit breaker for the CVR (cockpit voice recorder) was not pulled. The maintenance team went out to get it, but it was right at about the two-hour mark," Homendy said.
The plane's flight data recorder and cockpit voice recorder were sent to NTSB labs on Sunday to be read but no voice data was available,
...
Although today's recorders use computer chips inside "crash-survivable" containers able to withstand g-forces 3,400 times the feeling of gravity, critics say the capacity for recordings housed inside them remains less than an ordinary cellphone.
(Excerpt) Read more at reuters.com ...
You must lead a boring life is all I can say. We have conspiracies all around us. They're everywhere! You can't throw a rock in Washington DC without hitting a conspirator.
Missing part of Alaska Airlines plane is found in Portland, NTSB says, as new details emerge
From the link...
...“There is nothing on the cockpit voice recorder,” she said, noting the maintenance team went out to get the recorder around the two-hour mark when the devices begin a new recording cycle...
Right at the 2 hour mark...
How convenient...
For folks wondering how the heck this could happen, see my above link.
The 2 hour recording time is something well known and, to my mind, there’s no good reason for it.
Uh I dunno,if I were sitting in that seat, I'd want some kind of assurance of how that is never happening again, and some replacement underwear.
You’re old if you know who that is.
And I ought to know.
I would like to have someone tell me why the seat closest to the hatch was unoccupied. A seat like that with the extra leg room and window seat are usually the first to go. Sounds like Alaska Airlines and the FAA has a lot of explaining to do.
you win :)
It is a fascinating life.
See tagline...
No, they record continuously like an old-fashioned loop tape recorder (I think at one time they WERE loop tape recorders), so whatever is older than X amount of hours is gone.
*****************************************************
They were tape loops. Changed a few of them.
Last time I worked on a plane was back in 1980. Should be MUCH better now.
The two hour delay is because the pilots union doesn’t want to be recorded. They are afraid management will use the longer recordings against them.
The two hours are what the unions finally agreed to.
Any hard drive could record weeks of data. Why do they want only 2 hours of data?
To protect the guilty?
#5 So far 4 other aircraft have been found with loose bolts.
May be the new guy on the assembly line and Boeing skipped the quality check.
#24 There were 2 people in those seats but not anymore....
People would be shocked at how old some of the aerospace tech is that we're using. Especially in the military!
We're talking about systems that take years, decades even, from the initial planning and design phase to fleet rollout. In between this time, the tech behind smaller subsystems and various components has changed so much and so quickly that the original parts are already obsolete from the first flight.
Everybody forgets how trial lawyers were Public Enemy #1 before Obama appeared on the scene, and they haven’t conceded one ounce of their influence since then.
Boeing does not manufacture the flight data recorders or the cockpit voice recorders. They are supplied by avionics companies are are manufactured to a set of standards set by the government.
COULD they end up re-used dirty? I recall drying my hands on dirty-looking ones...
Perhaps they were laundered and first use, just stained badly?
I can remember being a kid with Sam Ervin on the TV. Does that date me?
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