You see in the real world things don't always live up to expectation hence the common phenomenon of FDRs not recording data up to the point of impact. Again, another big assumption being made is that everything outside of the FDR was working perfectly and that there was no power failure.
What are the reasons for FDR's not recording up to the impact point?
There must be some excuse for this, correct?
You can't name ONE example of a flight recorder that did not perform
to expectation.
Your examples of flight data 'missing' are from airliners that experience
severe/catastrophic failures mid flight, and you attribute that loss of data
to FDR failure. Should I insert the rolling eyes here?
The loss of data from impact and beyond is a reasonable, and logical standpoint
because the FDR will lose power at some instance beyond crashing.
There is no excuse for AA77 to lose data, and it's also electrically impossible
to erase single cells of data. Corruption, or partial frame yes....erasing - NO.
Here is a little more tech about flash memory, but I don't expect anyone
here to understand since you cannot comprehend the basic data transfer
of the flight system:
With the above image, can anyone explain how a few certain data cells
are erased without effecting an entire block?
http://www.procision-auto.com/911/911_mem_block.JPG
Actual Flash Memory used in AA77's FDR
FA2100 CSMU
Prior Intel 32 Mbit Binary Devices, Intel Part Number DDI28F032SA100 (5V)
2000.6 Intel 32 Mbit Strata Flash Devices, Intel Part Number E28F320J5-120 (5V)
2005.8 Intel 128 Mbit Strata Flash Memory, Intel Part Number TE28F128J3C-150 (3V)
http://pdf1.alldatasheet.com/datasheet-pdf...F320J5-120.html
Let's see all of your electronic skills at work now. We'll separate the experts
from the players.