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21
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Shutter on October 17, 2021, 04:14:19 PM »
If not mistaken, Cooper used the interphone at the start of the flight, then used the PA at 8:05..
22
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by georger on October 17, 2021, 04:03:09 PM »
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The interphone and P.A. system were linked to the CVR...

§ 25.1457 Cockpit voice recorders.
(a) Each cockpit voice recorder required by the operating rules of this
chapter must be approved and must be
installed so that it will record the following:
(1) Voice communications transmitted from or received in the airplane
by radio.
(2) Voice communications of flight
crewmembers on the flight deck.
(3) Voice communications of flight
crewmembers on the flight deck, using
the airplane’s interphone system.
(4) Voice or audio signals identifying
navigation or approach aids introduced
into a headset or speaker.
(5) Voice communications of flight
crewmembers using the passenger loudspeaker system, if there is such a system and if the fourth channel is available in accordance with the requirements of paragraph (c)(4)(ii) of this section.
(6) If datalink communication equipment is installed, all datalink communications, using an approved data message set. Datalink messages must be recorded as the output signal from the communications unit that translates
the signal into usable data.


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How many times did Cooper use the interphone ?  Once?  Everything's OK ... ?  I thought it was Tina who did all the talking ?
23
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Robert99 on October 17, 2021, 03:38:52 PM »
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The earliest CVRs used analog wire recording, later replaced by analog magnetic tape. Some of the tape units used two reels, with the tape automatically reversing at each end. Currently, the most widely used CVRs in commercial transportation are capable of recording 4 channels of audio data for a period of 2 hours. The previous requirement for a CVR to record for 30 minutes was found to be insufficient in many cases. In some accident investigations, significant parts of the pertinent audio data were missing as they occurred more than 30 minutes before the end of the recording (the tape capacity would result in audio information being overwritten every 30 min.)

Since the CVR in the hijacked airliner was probably the one that was installed when the aircraft was manufactured in 1964, the tape was probably overwritten several times before the airliner landed in Reno.
24
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Robert99 on October 17, 2021, 03:34:16 PM »
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The interphone and P.A. system were linked to the CVR...

§ 25.1457 Cockpit voice recorders.
(a) Each cockpit voice recorder required by the operating rules of this
chapter must be approved and must be
installed so that it will record the following:
(1) Voice communications transmitted from or received in the airplane
by radio.
(2) Voice communications of flight
crewmembers on the flight deck.
(3) Voice communications of flight
crewmembers on the flight deck, using
the airplane’s interphone system.
(4) Voice or audio signals identifying
navigation or approach aids introduced
into a headset or speaker.
(5) Voice communications of flight
crewmembers using the passenger loudspeaker system, if there is such a system and if the fourth channel is available in accordance with the requirements of paragraph (c)(4)(ii) of this section.
(6) If datalink communication equipment is installed, all datalink communications, using an approved data message set. Datalink messages must be recorded as the output signal from the communications unit that translates
the signal into usable data.


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Note that this is the requirement for CVRs that was effective on January 1, 2012.
25
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Shutter on October 17, 2021, 09:20:45 AM »
The earliest CVRs used analog wire recording, later replaced by analog magnetic tape. Some of the tape units used two reels, with the tape automatically reversing at each end. Currently, the most widely used CVRs in commercial transportation are capable of recording 4 channels of audio data for a period of 2 hours. The previous requirement for a CVR to record for 30 minutes was found to be insufficient in many cases. In some accident investigations, significant parts of the pertinent audio data were missing as they occurred more than 30 minutes before the end of the recording (the tape capacity would result in audio information being overwritten every 30 min.)
26
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Shutter on October 17, 2021, 09:11:36 AM »
The interphone and P.A. system were linked to the CVR...

§ 25.1457 Cockpit voice recorders.
(a) Each cockpit voice recorder required by the operating rules of this
chapter must be approved and must be
installed so that it will record the following:
(1) Voice communications transmitted from or received in the airplane
by radio.
(2) Voice communications of flight
crewmembers on the flight deck.
(3) Voice communications of flight
crewmembers on the flight deck, using
the airplane’s interphone system.
(4) Voice or audio signals identifying
navigation or approach aids introduced
into a headset or speaker.
(5) Voice communications of flight
crewmembers using the passenger loudspeaker system, if there is such a system and if the fourth channel is available in accordance with the requirements of paragraph (c)(4)(ii) of this section.
(6) If datalink communication equipment is installed, all datalink communications, using an approved data message set. Datalink messages must be recorded as the output signal from the communications unit that translates
the signal into usable data.


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27
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by georger on October 16, 2021, 03:47:33 PM »
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The cockpit voice recorder was on a loop. typically, it recorded about 30 minutes and then was recorded over. even if Cooper went into the cabin before jumping, the recording would of been lost..

Hey Shut/All, I get the part that the last communication from Coop was at 8:05pm-ish and by the time the plane landed in Reno, it was well past the 30 minute loop.  But for clarification, is the flight interphone system communication indeed recorded in the flight voice recorder ?  In other words, if the plane would have landed before 8:35pm, would Coop's voice communication have been recorded ?  Also, is there a manual shut off of the 30 minute loop, or could the recording be stopped manually from the plane I guess is what I am asking? Pretty sure this is NOT possible today, but curious if in 1971 pilots or crew could stop the recorder from the plane?  Thanks!

The voice recorder had 4 microphones going into it. if Cooper used the P.A. his voice would of been recorded in the cockpit. a microphone is in the cockpit to listen to the crew and sounds that could be helpful in accidents. I don't believe any aircraft allows disconnection but newer versions allow the pilots to turn on the CVR and erase the last 2 hours. newer versions record the last 2 hours of flight.

I doubt the FAA would allow the option of turning of the CVR..

There is no evidence that the Interphone conversations could be directly recorded on the hijacked aircraft.  However, I am aware of at least one later accident investigation in which the accident aircraft did record the Interphone conversations directly.  That is, both ends of the conversation were directly plugged into a recorder.

In the 1960s and 1970s, there was a long-running argument/litigation between the FAA and the Airline Pilots Association about recording any cockpit conversations.  I doubt if that argument has been completely resolved even today.

This may all be much to do about nothing. Read the entire context of page 108! At issue is a movie producer, someone making a movie, who 'somebody' has allegedly given a "printout" of a confidential cockpit voice recording - the FBI is trying to determine who gave this information to the producer, and if these allegations of a printout of cockpit voice recordings are even true!

Who gave this vital 'cockpit recording' to this producer? An FBI agent, Rataczack, ... who? Does such a document even exist ?  (Or is this alleged cockpit recording printout merely part of a movie SCRIPT) ?

The issue comes up in a 6 page document in relation to the suspect Coffelt -  and a movie about suspect Coffelt ?

Read all of the pages for context. Part 62 pgs 107-111.
28
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Robert99 on October 16, 2021, 12:47:06 PM »
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The cockpit voice recorder was on a loop. typically, it recorded about 30 minutes and then was recorded over. even if Cooper went into the cabin before jumping, the recording would of been lost..

Hey Shut/All, I get the part that the last communication from Coop was at 8:05pm-ish and by the time the plane landed in Reno, it was well past the 30 minute loop.  But for clarification, is the flight interphone system communication indeed recorded in the flight voice recorder ?  In other words, if the plane would have landed before 8:35pm, would Coop's voice communication have been recorded ?  Also, is there a manual shut off of the 30 minute loop, or could the recording be stopped manually from the plane I guess is what I am asking? Pretty sure this is NOT possible today, but curious if in 1971 pilots or crew could stop the recorder from the plane?  Thanks!

The voice recorder had 4 microphones going into it. if Cooper used the P.A. his voice would of been recorded in the cockpit. a microphone is in the cockpit to listen to the crew and sounds that could be helpful in accidents. I don't believe any aircraft allows disconnection but newer versions allow the pilots to turn on the CVR and erase the last 2 hours. newer versions record the last 2 hours of flight.

I doubt the FAA would allow the option of turning of the CVR..

There is no evidence that the Interphone conversations could be directly recorded on the hijacked aircraft.  However, I am aware of at least one later accident investigation in which the accident aircraft did record the Interphone conversations directly.  That is, both ends of the conversation were directly plugged into a recorder.

In the 1960s and 1970s, there was a long-running argument/litigation between the FAA and the Airline Pilots Association about recording any cockpit conversations.  I doubt if that argument has been completely resolved even today.
29
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Shutter on October 16, 2021, 09:26:52 AM »
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The cockpit voice recorder was on a loop. typically, it recorded about 30 minutes and then was recorded over. even if Cooper went into the cabin before jumping, the recording would of been lost..

Hey Shut/All, I get the part that the last communication from Coop was at 8:05pm-ish and by the time the plane landed in Reno, it was well past the 30 minute loop.  But for clarification, is the flight interphone system communication indeed recorded in the flight voice recorder ?  In other words, if the plane would have landed before 8:35pm, would Coop's voice communication have been recorded ?  Also, is there a manual shut off of the 30 minute loop, or could the recording be stopped manually from the plane I guess is what I am asking? Pretty sure this is NOT possible today, but curious if in 1971 pilots or crew could stop the recorder from the plane?  Thanks!

The voice recorder had 4 microphones going into it. if Cooper used the P.A. his voice would of been recorded in the cockpit. a microphone is in the cockpit to listen to the crew and sounds that could be helpful in accidents. I don't believe any aircraft allows disconnection but newer versions allow the pilots to turn on the CVR and erase the last 2 hours. newer versions record the last 2 hours of flight.

I doubt the FAA would allow the option of turning of the CVR..
30
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Kari on October 16, 2021, 08:59:59 AM »
Bruce had been a great help and very kind. Without an disrespect to anyone, im not trying to be graded on a "good" story here I just simply told my Db cooper story an told it the best I could,  although I wish I would of spent more time to edit before I posted, regardless I just wanted to put it out there an see what others thought. I guess being slammed is a bit harsh but for people to say I took allot of time in putting all the pieces together to make a good story,  or my story was too far fetched, exgerrated etc when none if it was,  seriously it really was honest to God facts.  I do however see how people can be skeptical. So I guess what I am asking is what does everyone wanna hear. I of course can't give you the real names,  yet. I can contact the detective in mount vernon and ask his permission to give his name, ID be happy to do that. Im willing to even have someone go with my husband an I an wait on the sideline, someone such as Bruce while we go confess to Dan and Jesse about all this, if they have not already found out. In fact Bruce has been told that when I go there he will be the first to know and the first to get the outcome of the visit. I don't know what else I can do to validate my story. My family along with the detective can validate. My daughter as much as she believes its him really don't want me doing any of this, is afraid I may get hurt but if need be she will always have my back.  So, for now I can say this,  the police dept where I brought the DB cooper photo to was the mount vernon police dept. I'll give them a call an see if I am allowed to give names etc an than take it from there. In the meantime if you can think of anything else, like I said just ask an ill do my best to answer you. By the way ill give u something else,  Dans grandpa was involved with the FAA an had claims to airports in Alaska. Also had some military background,  so my husband says. That is something my husband was told by them not me, just thought I would share that with you. It could mean something an it might not, oh an the cow Alice, named after a niece who was a flight attendant,  I agree pretty far fetched but the gods honest truth. Trust me EVEN I HAVE A HARD TIME BELIEVING THIS an it does sound pretty darn fabricated if u ask me but it really just is not. Now go easy on me here, im not trying to get an A on this story,  its just my story an God knows I'm not a writer ok. Take care an ill keep you posted on how the visit goes. We might even go tomorrow.  Bye for now..... Kari
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