After reading "Fly By Wire" on a recent trip, I find it interesting to visit Amazon.com and see a recapitulation of the passionate debate that Langewiesche describes in his book. On the one hand, there are those who feel that "fly by wire" technology is overrated and perhaps even dangerous--these reviewers tend to give the book low marks and hard reviews, some of which strike me as a bit unfair. Other reviewers--admirers of Langewiesche's journalistic style or the cogent explanations that he offers--give him high grades. On balance, I enjoyed "Fly by Wire," but I can understand how it will hit some raw nerves.
For the record, Langewiesche has nothing but high praise for Captain Sullenberger and his crew. He agrees that they did a superb job under incredibly difficult conditions, and the fact that they did it in an Airbus A320 takes nothing away from their accomplishment. As near as I can tell, the crew of US Airways Flight 1549 are real heroes and deserve the praise they have received.
"Fly by wire" technology combines electrical control circuits and digital computers to replace traditional hydraulic and mechanical flight control systems. Langewiesche really "pokes the bear" and elicits a strong emotional response from many of his readers when he suggests that "fly by wire" was a major contributor to the Miracle on the Hudson. Readers who want their heroes to be like Beowulf, brave and omnisciently skilled, dislike the suggestion that Captain Sullenberger and his team may have been helped by the revolutionary design of the A320. Pilots who are concerned about losing control over their aircraft to computers are also bound to take issue with Langewiesche's core theme, which is that the revolution in "fly by wire" technology pioneered by Airbus has saved lives and will continue to save them. It's not unreasonable for people to argue with Langewiesche's thesis, but I'm glad that he and others are having this debate--I suspect that in the long run many air travellers will be safer for it.
Regardless of your views on this hot topic, the book is worth a read. The author is an experienced pilot, so he is able to offer more insights than most journalists who covered this story. He does a good job of discussing bird strikes (especially the somewhat unusual one that crippled Flight 1549), the development of the A320, several crashes where "fly by wire" technology might have saved hundreds of people, and other examples where highly skilled pilots "pushing the envelope" in passenger aircraft have confidently done things that are amazingly dangerous, with disastrous results.
At the end of the day, I'm sympathetic to Langewiesche's argument that even great pilots can make mistakes, and that computers can help them accomplish things at the edge of their skills and experience that they would have a hard time doing on their own. Whether the computer or the crew was the decisive factor in The Miracle on the Hudson is at some level beside the point--not every pilot will be as skilled or capable of concentration as Captain Sullenberger, and computers can help prevent mistakes by crew who are pushing the outer edge of their experience and abilities.
For those who are convinced that "fly by wire" can never outperform a great pilot, consider two things. First, the question is not really whether fly by wire can outperform Captain Sullenberger, but whether it can outperform the average pilot with the average level of experience and savoire faire. Put another way, the next time you board an airplane, ask yourself whether the pilot flying your aircraft is one of the greats who will act like Captain Sullenberger, or one who has less skill or experience (the law of probability suggests that on any given flight, you are more likely to have the latter at the controls). Second, if you believe that "great" pilots are superhumans who never make mistakes, read
Sway: The Irresistible Pull of Irrational Behavior, which describes how KLM's famous and accomplished chief pilot made a series of errors that resulted in the worst air disaster in aviation history. Everyone, no matter how skilled, makes mistakes--"Fly By Wire" helps us to understand how we can harness our technology to avoid errors at the edge of the envelope where the skills or experience of most people gets spottier.