They do this with all components that they wish to salvage out of drowned aircraft. The very instant that you remove submerged components from the water they start to corrode. It better to keep them in the water until they get to an inspection/repair facility where the can be transferred to a corrosion inhibiting media. After that they can be taken to the workbenches.
If it was recovered from under water, letting it dry out could damage the recording so that they couldn't read it at all.
There are ways to safely recover the recording without damaging it, but it has to be done in a controlled manner.
The precise time of loss of Air France flight AF447 on 1-Jun-200 is unknown. The flight was out of radar range at the time and the flight data/voice recorders have not been recovered.
The Data option
Flight recorders have limitations such as not being able to prevent accidents, limited storage capacity for recording data, and the potential for data to be lost if the recorder is damaged in a crash. Additionally, retrieving flight data from underwater can be challenging and time-consuming.
Flight data recorders, commonly known as black boxes, typically retain recorded information for at least 25 hours of flight data. The duration can vary slightly depending on the specific model and regulations, but most modern recorders are designed to overwrite old data after this time frame. Additionally, they often store critical flight data and cockpit voice recordings that can be crucial for accident investigations.
Examples of black boxes include flight data recorders on airplanes, event data recorders in vehicles, and cryptographic algorithms in digital security systems. In general, a black box refers to a system or device that operates based on inputs and outputs without revealing its internal workings.
Small planes typically do not have black boxes like larger commercial aircraft do. While some small aircraft may be equipped with cockpit voice recorders (CVRs) or flight data recorders (FDRs), these features are not standard and are often optional. Many light aircraft rely on simpler systems for recording flight data, and the regulations regarding such equipment can vary by country and type of aircraft.
No
Yes, data can be recovered from a tape using various software available in the market.
Yes, the black box from United Airlines Flight 93 was recovered after the plane crashed in Pennsylvania on September 11, 2001. Investigators found both the cockpit voice recorder and the flight data recorder at the crash site. These recordings provided crucial information about the events leading up to the crash and the actions of the passengers and crew.
"Black box" everywhere except aviation means a device whose users know what the inputs and outputs are, but not what's happening inside. In aviation, a "black box" (which is really painted orange so it's easy to find in the wreckage) is a recorder. Planes that are required to carry them have two - the cockpit voice recorder and the flight data recorder.
Because the first Flight Data Recorders were conceived in 1953 and the first one was produced in 1957 in Australia, it is assumed that the first one to be installed and field tested was on some Australian aircraft.
As you have recovered data from the failed hard-disk, it would be best to buy a new hard-disk.