Why Do Airlines Keep Black Box Flight Data Trapped on Planes?

Seriously, is there any information of value we don't transmit to the cloud these days?

Financial, operational, personal: it's all 'up there' somewhere. Banks, governments, the military, all entrust, to varying degrees, essential data to this storage system. Because they have to. The cost of maintaining it on their own is prohibitive - and not doing so is increasingly inefficient.

So the fact that Malaysian Airlines Flight #370 has disappeared without a trace seems remarkable in this era when individuals have no problem keeping track of their friends, family, children and pets. To say nothing of their approximate distance from their favorite cocktail or pasta dish.

The fact that a plane's flight data recorder keeps all that information on the plane rather than transmitting it to an external and presumably crash proof storage site regularly keeps investigators from unraveling the mystery of what happened - especially in this case.

The reason for the industry reticence to follow an obvious global norm appears to be cost, as the following article explains. Sending data in real time is an issue for auto companies attempting to provide up-to-the-minute services to car owners and it is a similar challenge for airlines.

The question, from a public policy standpoint, is whether the relative cost can somehow be reduced when spread over the entire world's airline network. There will probably be security concerns - more in some countries than in others - and there may even be anti-trust issues about companies in one industry sharing what could be construed as competitive data.

One suspects that demand will drive innovation as it has in so many other markets. In this case, that demand may eventually be driven by the insurance industry whose access to the data could well help them moderate their potential liability. JL

Justin Bachman reports in Business Week:

The answer is mostly about one issue: cost. Sending all the data from each flight in real time via satellite would be enormously expensive.

To solve the mystery of what happened to Malaysia Airlines (MAS:MK) Flight MH370, investigators need the airplane’s data and voice recorders. In an airplane tragedy, however, the information stored in the so-called black box inevitably ends up inside a wreck. This seems like a terrible place to keep the clue you need to find most.

As investigators scour the Gulf of Thailand and waters as far north as Hong Kong for debris from the Boeing (BA) 777-200 that vanished en route to Beijing on Saturday, there’s almost no indication yet of what doomed the flight and the 239 passengers on board. So far, at least, no wreckage or jet fuel has been found. Without recovering the black box, there’s little way to know what caused a plane cruising at 35,000 feet to disappear from radar.
Why not transmit this flight data off the plane so it’s accessible almost instantly? Airlines, after all, track each of their flights everywhere in the world and can advise crews on course adjustments, security alerts, quick weather changes, and a host of other situations. Passengers are routinely offered in-air Wi-Fi and live television these days. So why keep vital data trapped on the plane?

The answer is mostly about one issue: cost. Sending all the data from each flight in real time via satellite would be enormously expensive. A 2002 study by L-3 Aviation Recorders (LLL) and a satellite provider found that a U.S. airline flying a global network would need to spend $300 million per year to transmit all its flight data, even assuming a 50 percent reduction in future satellite transmission costs. And that’s just a single airline. Commercial airline disasters, meanwhile, are becoming even more uncommon as technology and techniques improve—in part thanks to lessons from past crashes—so there’s little incentive for investing heavily in real-time data.
Businessweek last explored this question in July 2009 as French and Brazilian authorities searched a wide section of the Atlantic Ocean for a missing Air France (AF:FP) flight. The data recorders aboard the Airbus (AIR:FP) A330 remained missing for almost two years, some 2 miles beneath the surface, before searchers finally recovered them.
If the Malaysia Airlines flight did go down at sea, as searchers believe, waters in the suspected crash area are much shallower than in the region of the Atlantic where the French jet went down. In both cases, meanwhile, the flight data and cockpit voice recorders were made by Honeywell (HON) Aerospace. Despite the conventional term “black box,” the Honeywell recorders and most others in use are actually bright orange in color.

Of course, there remains the possibility that a powerful enough calamity could have obliterated the data boxes on the Malaysia flight, leaving investigators without their best hope for discovering what went wrong. No data recorders were ever recovered from the two Boeing airplanes that crashed into the World Trade Center.