Cessna 340
7 min read

When people ask me what I think of the King Air that I used to fly, “what was my favorite thing about the airplane?” I have an immediate and firm answer. It has a pilot’s relief tube.

I was taking customers to KMLI in a Cessna 340. This was back in the 1990s so we are talking steam gauges and Jeppesen binders. Cell phones were still a novelty. I had a co-pilot with me whose day job was a first officer for a major airline. Great guy. As I was getting the plane ready, making sure snacks were on board, herding the cats which our customers generally were, I made a quick mental run through of all the items that I’d need to do before I left. This is something they don’t teach you in pilot training.

Cessna 340

The 340 is a great airplane, but bathroom amenities are non-existent.

Track a VOR, yep.

Power off stalls? Right there on the syllabus.

Did you arrange the rental car at the destination? Uh yeah.

What about the customer who only drinks that one brand of bourbon. Did you get some mini bottles of that? Of course.

AND remember to bring them with you to the airport? Um…

And two carafes of coffee, right? Because that one guy last time wouldn’t drink caffeinated coffee.

Everything was ready to go, except I really should go pee before we hop in the airplane…

“Nah, I’ll just go when we get to our fuel stop in Kentucky.” Loaded as heavy as we were, and with the headwinds we were expecting, we had to stop for fuel. Bowling Green looked about right and wasn’t so far away that I couldn’t make it.

So I closed the air stair door, sidled up front, and off we went.

Despite this being back in the stone age, we did have a GPS in the plane, state of the art with its green, 2″ monochrome screen. It was really neat to be able to twist knobs and push buttons and calculate the actual winds aloft and our expected arrival time. Unfortunately I must not have been very adept at using it, because instead of the 20 knot quartering headwind that was forecast, this stupid thing kept saying I had 45 knots on the nose. “That can’t… be.. right…”

Ugh. This was going to be a long trip.

As we toodled along at our greatly diminished ground speed, my lack of hitting the facility before we left was becoming a problem. I tried to think happy thoughts, talk to my co-pilot to keep my mind off things, generally be a professional and pretend there wasn’t a problem. Instead I was watching everyone guzzle coffee and I was getting unwelcome mental images of Niagara Falls.

I was furiously calculating and recalculating the winds aloft, trying to figure out a way to make our ground speed better. Maybe a bit higher? A bit lower? But hemmed in between the fuel range with NBAA reserves, the steady headwinds, and our planned fuel stop, I didn’t have a lot of choices.

As we got closer to our fuel stop, I progressed from uncomfortable annoyance to horrible pressure to “I’m going to need a doctor if this goes on much longer.” Finally we began our descent into KBWG. I’d mentioned to my co-pilot, during our cruise portion, that I really needed to go to the bathroom. He acknowledged and dismissed this bit of information with an easy indifference. Not my bladder, not my problem. But as we started down, I told him I may need his help on landing.


“Because the pain is so bad, I’m not sure I can use the rudder pedals.”

Now he looked invested in the conversation.

At this point, I know what you are saying to yourself. “Self, what kind of idiot gets himself into a situation like this? Why didn’t he just stop short and go to the bathroom?”

Relief tube

A simple device, but sometimes a life-saver.

First, all options were considered and discarded. If we stopped short, with these headwinds, that would have turned this flight into a two fuel stop trip instead of one. Something I’d have to explain to the boss, and to the customers. It would add time that we didn’t have, and cost that wasn’t needed for my personal comfort.

Second, as the guy who supposedly knew what he is doing, being the one who didn’t go to the bathroom before we left was not something I wanted to admit. I’m not saying pilots are prideful, but…

Third, we would be there shortly. I could make it (repeat quietly to yourself over and over).

I flexed out a few tentative rudder pushes and decided I could make do. We would be on the ground soon so we were good.

“N12345, turn left 20 degrees, this will be vectors for the localizer approach. Glide slope is out of service.”

What? No ILS? The minimum descent altitude (MDA) for the localizer would get us in, but just barely. Great.

We cruised along on vectors and then after intercepting the localizer, we waited for clearance to actually start the approach and descend.

“Uh approach, N12345, can we start our descent?”

“Negative 345, traffic below, will be a few miles.”

We were getting closer and closer to the airport. With turbocharged piston engines, I couldn’t just yank the throttles and push the nose over. I had to worry about shock cooling. Finally when we were about to request we turn around and try again, we blessedly got the approach clearance. I pulled power as much as I could and nosed over to get to MDA, tracking the localizer inbound.

Just as we got to MDA, we popped out of the clouds and there was KBWG – bright and clear and beautiful. And almost directly below us.

My co-pilot looked at me with pity in his eyes and said, “Sorry, no way you can make it from here. We’ll have to go around.”

My calm and professional response?

“Screw that.”

Using my recently tested skills of rudder mashing, I put in a heap of right rudder and dropped the left wing. The 340 slips beautifully. If you haven’t tried it, have a go. I was looking at the runway out of the side window, holding my slip to get down to a landing position. I glanced over (now up in our slip) to my co-pilot. He was as white as a sheet and not saying anything. The customers were still chatting away amiably in the back, oblivious.


The runway at BWG is long, but what if you’re way too high?

The slip entry and exit were gentle and everything was shaping up nicely, even though this was the longest and steepest slip I’d ever done. But all was well, so why was he so upset? I queried him quickly and he just shook his head. No time to figure it out now.

I popped out of the slip, dropped full flaps, and touched down without a problem, making the last turn off with little braking. Before we were off the taxiway, I was already out of my seat belt, pushing through the customers, and at the air stair door ready to drop it the moment the co-pilot stopped at the ramp.

Several minutes later, my co-pilot took up station at a urinal beside me in the bathroom. I looked over and asked him, “Hey, why’d you look so scared on the way in?”

“You can’t slip a 340.”

“Yes you can, I just did. You can slip a Boeing, why wouldn’t you be able to slip a 340?”

“It is a prohibited maneuver. It is in the POH.”

“What?! I’ve never seen that. Why is it prohibited? It slips just fine.”

“It unports the fuel pickups. The engines will quit.”

After several seconds of bladder relieving thought, I replied, “We were already too high, I didn’t need engines anyway.” What else can you say at that point? We were down and safe.

After completing our trip and seeing our customers safely delivered to their destination, we pulled out the POH and did a thorough review of any and all limitations. My intrepid co-pilot, unfortunately, spent his time bouncing between airplanes and had mistaken the 400 series Cessna no slips limitation for an all encompassing twin Cessna limitation. 340s are indeed able to slip freely.

Today my daughter, whenever I mention the possibility of buying a new airplane, only asks one question.

“Does it have a potty?”

That’s my girl!

Dan Moore
Latest posts by Dan Moore (see all)
23 replies
    • Dan Moore
      Dan Moore says:

      Thank you. This one was fun to write. Plus I had the added advantage that I was actually supposed to be doing something else so this was some quality procrastination.

    • Dan Moore
      Dan Moore says:

      I guess a liquid is a liquid. Unfortunately back in those days we had neither sick sacks or the ability to partition off the cockpit from the passengers.

  1. José Serra
    José Serra says:

    Funny story. In planes without facilities, and no “paying passengers” always take with You a bottle with, at least, 1,5 liters capacity. Lol.

    • Dan Moore
      Dan Moore says:

      I think we have multiple bottles floating around now. But only because my airplane partners are smarter than I am. I still long for a relief tube. Maybe I can add one to my SuperSTOL I’m building.

  2. Mike Sheetz
    Mike Sheetz says:

    Really enjoyed reading this! I make it a practice to not fill up on soft drinks and to hit the bathroom before a flight. My corporate pilot brother witnessed and experienced a few episodes of those needing to relieve themselves. The relief tube often became a crucial asset for a favorable flight outcome.

  3. Hunter Heath
    Hunter Heath says:

    A preflight trip to the loo was a checklist item for me, esp. as I approached… a certain age.

  4. Vic
    Vic says:

    At my age, I make it a rule never to pass a perfectly good bathroom. However, one day I had scheduled an IFR flight of about 1:30, and due to some delays, had two cups of coffee instead of my usual one. I took off feeling pretty good, but about halfway through the flight, the bladder pressure started to mount. It kept getting worse, with no relief in sight. Finally I broke out on final at about 700 AGL, and thought, “Whew, I’m not going to have to declare an emergency!” But after touchdown, I experienced a severe vibration as the nosewheel touched down, and realized I had a flat nose tire. I was able to taxi clear of the runway and called tower for a tow. Tower was about 1/4 mile away, so I was able to relieve myself on the other side of the plane. When the tug arrived, the driver excitedly pointed to the puddle and said “Is that fuel??”

    • Dan Moore
      Dan Moore says:

      That is an awesome story. Did you tell the truth or make up a story for where the puddle came from? It would be hard to resist having a little fun with the line guy.

  5. Pat from Air Facts
    Pat from Air Facts says:

    You could have totally confused the lineguy (and told the truth at the same time) by saying, “Yes, it’s used fuel.”


    My funniest flight was in the Cessna 310A, Blue Canoe, as dubbed by the USAF. The flight was from Hill to Minot, N.D. to pick up a navigator for a flight overseas in the C-54. I reported to base ops at 2 hours before the flight and proceeded to have two cups of coffee in the coffee shop. What I forgot was that unlike most airplanes that carried passengers, the Blue Canoe did not have relief tube. When I reported in over Rock Springs, I needed to pee. So I cancelled IFR flight plan and requested VFR approach into Rock Springs Airport. After landing, I pulled off on a taxi way, jumped out of the aircraft and went pee, jumped back in the aircraft and took off. Lesson learned!


    Another story. On a flight back from LAX to Hill AFB, I had a staff judge advocate offer to buy the thermos jug we carried (why anyone would want to carry coffee in this aircraft is sardistic). I can’t remember his name, but I’ll never forget the look on his face, when I politely declined, coming out with a firm NO, Colonel.

Trackbacks & Pingbacks

  1. […] delayed, and that we could expect a longer than anticipated hold. This wasn’t great news, as I didn’t purchase an airplane with a relief tube. But luckily I was nervous enough about flying into an airshow that I didn’t have time to worry […]

Comments are closed.