B787 CVR
Thread Starter
Joined: Jul 2007
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From: london
B787 CVR
Morning all,
Is anyone able to confirm the looped duration or length or recording of the Dreamliner CVR?
I have heard mixed reports ranging from 6 hours to 24 hour but can't find anything written down to confirm either way.
ALB
RP
Is anyone able to confirm the looped duration or length or recording of the Dreamliner CVR?
I have heard mixed reports ranging from 6 hours to 24 hour but can't find anything written down to confirm either way.
ALB
RP
Joined: Nov 2010
Posts: 161
Likes: 7
From: N/A
Having the same question now! Hopefully we can get an answer with reference! Thanks
Joined: Apr 2009
Aviation Qualifications: Non-Aircrew
Posts: 1,600
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From: DM33
Why would there be any market for a 50 hour CVR when the latest mandate would require only 25 hours?
25 hours seems to be maximum offered by Honeywell. - https://aerospace.honeywell.com/us/e...ight-recorders
Also 25 hours voice for L3/Harris - https://www.l3harris.com/sites/defau..._Sept_2022.pdf
25 hours seems to be maximum offered by Honeywell. - https://aerospace.honeywell.com/us/e...ight-recorders
Also 25 hours voice for L3/Harris - https://www.l3harris.com/sites/defau..._Sept_2022.pdf
Joined: Jan 2011
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From: Seattle
Just a guess. But that might be the 'sweet spot' for flash memory price/performance. Memory manufacturers have no reason to serve the relatively tiny CVR market and stick to building the maximum size devices the market and technology will support.
Some CVR manufacturers might limit the capacity to match the spec in their firmware (to match the regulatory requirements). Others might just put in the current standard sized memory and let the customer use it all.
Some CVR manufacturers might limit the capacity to match the spec in their firmware (to match the regulatory requirements). Others might just put in the current standard sized memory and let the customer use it all.
Joined: Jul 2013
Aviation Qualifications: Non-Aircrew
Posts: 5,679
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From: Everett, WA
Just a guess. But that might be the 'sweet spot' for flash memory price/performance. Memory manufacturers have no reason to serve the relatively tiny CVR market and stick to building the maximum size devices the market and technology will support.
Some CVR manufacturers might limit the capacity to match the spec in their firmware (to match the regulatory requirements). Others might just put in the current standard sized memory and let the customer use it all.
Some CVR manufacturers might limit the capacity to match the spec in their firmware (to match the regulatory requirements). Others might just put in the current standard sized memory and let the customer use it all.
So when the vendor finds a component that 'works', they are reluctant to use something else.
Joined: Feb 2004
Posts: 1,410
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From: Australia
Would anyone know the general location of the forward (combined) FDR and CVR on a typical 787-8. I can see what looks like the aft (?) recorder in a photo of the aft pressure bulkhead.
Data Recorder Location (787)
Someone suggested the forward recorder was close to the aft recorder, but perhaps they are confusing the RIPS (backup power supply for the recorder). Unfortunately, I've retired, so I can't check the AMM or SSMs.
Strangely, the one in the photo looks like it's mounted upside down.
Thanks!
Data Recorder Location (787)
Someone suggested the forward recorder was close to the aft recorder, but perhaps they are confusing the RIPS (backup power supply for the recorder). Unfortunately, I've retired, so I can't check the AMM or SSMs.
Strangely, the one in the photo looks like it's mounted upside down.
Thanks!
Joined: Dec 2007
Posts: 953
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From: same planet as yours
One is located in the crown of section 41, just aft of the flight deck and the other in the crown of section 47, above the aft galley.
Joined: Feb 2004
Posts: 1,410
Likes: 37
From: Australia
It's so nice to be overwhelmed with information on the subject. Thanks gentlemen.
I always looked forward to crash investigation reports, as morbid as that sounds, as they often filled in the gaps in my systems knowledge. i.e. providing details not even found in Maintenance Manuals, Wiring Schematics or FCOMs .
Cheers
P.S. I'm assuming the -9 is the same as the -8
I always looked forward to crash investigation reports, as morbid as that sounds, as they often filled in the gaps in my systems knowledge. i.e. providing details not even found in Maintenance Manuals, Wiring Schematics or FCOMs .
Cheers
P.S. I'm assuming the -9 is the same as the -8
Joined: Jan 2025
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From: New Zealand
I think it's been implied/stated that it's little more than plugging a laptop into the front with an ethernet adapter.
Joined: Feb 2004
Posts: 1,410
Likes: 37
From: Australia
Found this image on YouTube for the forward recorder... showing the Forward EAFR mounted on the fuselage above door L1.
Forward EAFR above Door L1
Identified by the ULB mounted on it.
I read somewhere that the Aft EAFR is at Station 1847. Would anyone know what the station number of the tip of the nose is? AMM Chapter 6 anyone?
Thanks.
Forward EAFR above Door L1
Identified by the ULB mounted on it.
I read somewhere that the Aft EAFR is at Station 1847. Would anyone know what the station number of the tip of the nose is? AMM Chapter 6 anyone?
Thanks.
