Single Pilot Cockpit Techniques, Part I

We all start out in single pilot aircraft. That doesn’t mean single seat aircraft, it means aircraft that only require one pilot to be flown. (And that doesn’t mean they can’t be flown by two pilots—most aircraft do have dual controls—only that they were designed to be flown by a single pilot.) We first encounter the reality of a single pilot aircraft on the day our flight instructor steps out and says, “I think you’re ready to do this on your own. Take it around three times and taxi back here. Have fun.” Suddenly the airplane is empty and you have your first experience with single pilot operation.

Aircraft that require two pilots come in two varieties, those that are designed that way from the beginning, and those that are required to be operated that way by the regulatory part under which they are operated. Those that are designed to be operated by two pilots do not have to have all pilot controllable items—switches, levers, circuit breakers, knobs—accessible from the left seat, they only have to be accessible from one seat or the other. A dead give away to whether an aircraft was designed to be flown by one pilot or two is to look at the gear control lever: if it’s on the left side of the cockpit it’s a single pilot aircraft; if it’s on the right side it’s a two pilot aircraft. (Professional pilots often use the phrase, “I pulled gear for so and so…,” meaning “I was a copilot for so and so.”) Aircraft flown by two pilots have what every first solo pilot wants: someone to help. So for the pilot going from a single pilot aircraft to a dual pilot aircraft, the transition is fairly straight forward and simple: just keep doing what you always have, but let your copilot help. Help can include everything from “pulling gear,” letting you concentrate on flying and not having to reach blindly for the gear handle or glance away at a critical moment, to handling the radios, keeping track of the flight log and fuel management, programming nav computers, digging approach plates out, or anything else you want him or her to do. In professional practice, pilot often “swap legs”, alternating flying and non flying duties, and in the co-captains arrangement (my least favorite mode of crewing) they alternate seats as well, the captain for each leg alternating and sitting in the left seat. (It is my least favorite because it often leads to blurring the line between the pilot in command and the second in command. But that’s a story for another day.)

There aren’t any aircraft being designed any more for a three man crew (I guess I have to say “three person crew,” but when these aircraft were being designed, “three man crew” was how they were described), but there used to be lots, in fact the three man crew was a crew member or two less than those before them that also had navigators and radio operators. The third crewmember was a flight engineer, a non flying position, and his (or her) primary job responsibility was aircraft systems management, primarily the engines but also all systems associated with those engines: electrical, hydraulic, pneumatic, fuel, pressurization. It was a big job because these were big airplanes with very complex systems, multiple redundancies, and very specific troubleshooting and reconfiguring checklists. The transition from a two man aircraft to a three man aircraft was not so simple: you had more help, but how you put that help to work, and how you divided the duties while insuring that someone was still primarily responsible for flying the aircraft and nothing else wasn’t obvious: it had to be learned.

To see how this works, imagine yourself as the Captain in the left seat of an L-1011 at cruise altitude and everything is going along just fine, nice and quiet, when suddenly your flight engineer says, “Hey boss, I think we’re losing C system—the fluid level is less than half and dropping steadily.” Exactly what this means isn’t the point: in fact, the C system on the 1011 is the main hydraulic system, the one that powers all the flight controls and operates the gear and the nose wheel steering, and while there are backups, and while the gear can still be manually lowered (but not raised) and while the aircraft can still be controlled (by any one of three other hydraulic systems) even if the system is lost completely, losing C system is one of the big ones. (“Big ones” as in the Gary Larson cartoon where the captain announces to the passengers, “Well folks, we’ve got a warning light on up here, and dare if it isn’t one of the big ones.”)

The point is, how are you going to handle the problem? Just before this problem arose, you were the pilot flying—it was “your leg”—the copilot was the pilot not flying, the one handling the radios and the paperwork, and the engineer was leaning back in his chair with his feet on his desk looking at his panel like he always does. So what do you do now? If you try to help the engineer out, who’s flying the airplane? You could have the copilot try to help him out, but as a practical matter it is a lot harder for the right seat pilot to turn around and see what the engineer is doing than it is for you, you just have to turn sideways in your seat, and in any case, do you really want to just turn this problem over to the two of them while you just sit there? Probably not, so what you do is you say to the copilot, “I’m going to work the problem with the engineer. Your airplane.” meaning you, the copilot, are now the pilot flying, and the copilot would acknowledge the transfer by saying, “My airplane.” This means he has to handle the radios and paperwork as well for awhile, but at cruise that shouldn’t be a problem, and he can always ask for a little help if he gets overloaded, and it leaves you free to turn around in your seat and work with the engineer on the problem, going through the checklist carefully, agreeing on what you are seeing—a lot of checklists are, in reality, troubleshooting trees, with lots of “If this, then do this, if not, then do this” type commands—and confirming that he has his finger on the correct switch before pushing it: this would not be a good time to inadvertently disconnect one of the other hydraulic systems. So a big part of being a captain with a three man crew is learning how to best manage that crew, and the best way to learn it is as a copilot, watching captains deal with the problems that do come up. The next best way is in training, and the least best way is The Hard Way, or what we euphemistically call “experience”. The point is, going from a single pilot operation to a two pilot operation was fairly intuitive, but going on to a three crew operation was not.

So traditionally, meaning during the time I was coming up as a pilot, the normal progression was from student pilot to single pilot in command, then to copilot and captain of a two man operation and then eventually at some point usually through the same steps to captain of a three man crew (often with a stop along the way as the second officer, as pilots who are trained and serve as flight engineers are called in airline jargon). But over time things changed; As manufacturers learned to take advantage of computers and more robust, more reliable, and ultimately simpler aircraft systems, the flight engineer, or second officer, was eliminated, first on large two engine aircraft such as the Boeing 757 and 767, and then on all aircraft, Airbus 330/340s, MD-11s, 777s, even later models of the 747. And crews that had flown for years with three crew members, and who had gotten good at working together and relying on each other, had to learn to make do with just two crewmembers again. And that turned out to be a whole lot harder than learning to go from a single pilot to a dual pilot operation.

The main difference between going from a single pilot operation to a two pilot operation, versus going from a three man crew back to a two pilot operation, is that the single pilot is already used to having to do everything himself, whereas the pilot of a three man crew is used to having, and working with, lots of help. The single pilot who suddenly finds himself with a copilot has to learn to use that help, and the pilot who suddenly loses his flight engineer has to learn to make do with just the two of them. Each has some learning to do, but it is very different for each.

One of the main differences is that the three man crew is used to having back up: with three crew members, someone is always looking out for the other two, whether it is the flight engineer monitoring the radios or the captain backing up the flight engineer on his panel or the copilot monitoring the captain as he flies an approach. A good sort of dependency develops among an experienced crew—I can’t begin to count the number of times in my 727 or 1011 flying where one crewmember caught a mistake that the two others had overlooked, and no one crewmember had a monopoly on it—each made mistakes, and each caught mistakes. I used to say, as part of my standard crew briefing with pilots and flight engineers I hadn’t flown with before, “If you see something you don’t like or don’t understand or something that doesn’t seem to make sense, speak up. If it’s a mistake developing and we can correct it and keep it right here in the cockpit, it isn’t a mistake,” meaning if we can correct it before there are any negative consequences—something someone outside the cockpit is aware of—we’ve done our job.

The problem with that, with what I call a beneficial dependency, is that when you go back to the two man crew, you have to learn certain techniques to compensate for the fact that you don’t have that backup anymore. With a two man crew you are, of course, aware of what the other pilot is doing, but each has his job responsibilities and neither has the luxury of being able to just sit back and monitor the other. The airlines were very concerned with this lack of backup capability when the two man aircraft came back into their fleets, much more so than they were with the more obvious question of whether the aircraft could be flown safely and reliably without a flight engineer. So they developed some very specific policies and procedures to insure flight safety with just two pilots. Those policies and procedures are the subject of my next post, “Single Pilot Cockpit Techniques, Part II,” because those techniques also apply to pilots flying by themselves without any help at all.