Backcountry Pilot • All (partially anyway) Jammed up

All (partially anyway) Jammed up

Near misses, close calls, and lessons learned the hard way. Share with others so that they might avoid the same mistakes.
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All (partially anyway) Jammed up

So today I had something really interesting happen that I thought I’d share. My buddy and I had landed at Mexican Mountain and enjoyed hanging out on the strip while visiting and enjoying the beautiful scenery. While we were on the ground, the wind shifted out of the west. Usually I land west and takeoff east, but it’s not a big deal to depart either direction. The only real difference is the east end doesn’t have as nice of an area to turn around.

So, when the time came to leave I taxied down first and turned around at the end. My plane doesn’t turn very tight and I maneuvered to avoid the bushes nearby...I thought. The takeoff was normal up until right after rotation, when the aircraft pitched up a bit, which was unusual. Then I noticed the elevator was really stiff...and partially jammed!

About this time my buddy told me I was dragging a piece of a bush. I told him my elevator was partially unresponsive but I was still climbing and I planned to get some altitude before troubleshooting. I checked my left elevator. All normal. Then I checked the right and there it was. I could see part of the bush sticking out of the top of the horizontal stab and the green part of the bush under the elevator. We talked about what to do and we thought slowing down to slow flight and exercising the elevator might make it work free. With every 10 degrees of flaps I put in, the aircraft would pitch over pretty strongly, which makes sense since the airflow over the tail is changing. It took a lot of trim with each flap setting change. Unfortunately I wasn’t able to dislodge it. Bringing the flaps up had the same pitch changes and trimming in reverse.

By this time we were about to our fuel stop. Winds were light and variable and I elected to do a half flap landing. My concern was being able to get the nose up on an already nose heavy airplane. I slowed down and configured early so I could be stable. The last 30’ or so was a roller coaster! If I pushed on the yoke, it was very stiff and then would suddenly let loose, which would require an immediate opposite action. But, when you’d pull, it was stiff and then, yup, you guessed it! You’d get more than you needed. So, the result was a controlled oscillation for those last 30’, using power to help control the descent. With a little luck, I was able to time it just right to grease it on at the bottom of the second oscillation.

So, what happened? Well, when I made the turn at the end of the runway, I had the yoke full back as is normal in backcountry ops. In doing so, with the elevator full up, the horn we have on the elevator opens up to a V. That V snagged a 3/4” limb off of one of those bushes and wedged deep between the horizontal stab and elevator. The added drag from the greenery made sure it wasn’t coming out. That and some of the knots on the limb.

I’m still processing what the takeaway is from this. First and foremost is to fly the plane. Second, mind you’re tail when maneuvering on the ground. Years ago i read or heard that this could be an issue but I’ve never had it be an issue. Third, have a general idea of what configuration changes will make on the airflow around the aircraft. Fourth, probably a good idea to do one last control check before power application when maneuvering around anything that has the potential to get stuck in the tail. Fifth, another validation of why i prefer to fly with a buddy. He was a big help in figuring out what was going on and where the issue was. And if things went south, to get help. And lastly, it probably wouldn’t be a bad idea to do some air work using just trim, aileron and power or any other combination of controls where one or more are lost.

Anyway, it was a good learning lesson today. Hopefully this might help someone else or at least be food for thought.

Pet of the bush under my right horizontal tab.
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Grassstrippilot offline
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Re: All (partially anyway) Jammed up

If its flying DON'T change or mess with the configuration! Go to nearest suitable runway and land in the configuration you are already in. Sometimes as pilots we get into the "fix it" mode when a landing would be a better choice.

Im glad to hear this had a good outcome.

Kurt

PS not to criticize how you handled it but to give others something to think about. Good job!
G44 offline
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Re: All (partially anyway) Jammed up

No good point. We discussed it and I had time to give the ramifications some thought before I methodically, and slowly, put flaps in. I had altitude and figured that between trim and the partial range of motion I had, I wasn’t going to do anything that I couldn’t quickly undo. But you’re right, we do get into fix it mode as pilots. I was also curious if I’d be able to use any flaps and be stable for landing and how soon I’d want to configure. But leaving it as was definitely would have been more conservative...and maybe that little bend in the edge wouldn’t have happened. Thanks for the input! Always learning!
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Re: All (partially anyway) Jammed up

Glad it worked out ok!

I had a rock strike freeze my elevator solid...luckily it happened on landing and I found it on the pre-take off inspection.

Ever since then I've been real good about verifying that all controls are free and functional prior to take-off. It only adds a couple seconds to the final redundant check I do prior to pushing in the throttle...it'll also tell you if you forgot to remove the rudder lock, which is handy.
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Re: All (partially anyway) Jammed up

I’m pretty sure that area has a no brush cutting policy. I will be forwarding these photos to the proper authorities.
Sorry but rules are rules.
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Re: All (partially anyway) Jammed up

Thanks for posting. Thought provoking. Good on you for staying calm and working through your options.
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Re: All (partially anyway) Jammed up

akgreg wrote:I’m pretty sure that area has a no brush cutting policy. I will be forwarding these photos to the proper authorities.
Sorry but rules are rules.


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Re: All (partially anyway) Jammed up

You are clearly taking being a "bush" pilot too seriously. :mrgreen:
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Re: All (partially anyway) Jammed up

That’s a good lesson for the rest of us to learn from. Good job getting it down safely!
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Re: All (partially anyway) Jammed up

All's well that ends well. Good job! And you can tell Greg to just stuff it! Oh, I guess you already did that with the bush.

Cary
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Re: All (partially anyway) Jammed up

That same thing happened to a 206 departing the Flyin’ “B” but was jammed by a rock. The plane stalled and as the story was told to me, crashed killing the two on board.

Glad it turned out this time!
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Re: All (partially anyway) Jammed up

Back in the late 80's, Lake Powell Air Service used to fly river runners and crews out of Grand Canyon Caverns airstrip (L37). 3-4 trips a week.
I had just flown a trip out of there in a Piper Chieftain. Thought it was really cool 'cause the unusually wet spring had grown up wild sunflowers that were tall enough to brush the wingtips. The next day, new kid in a 207 wandered off the centerline and collected a bunch of the same sunflowers in the elevator horn/stab. As the 207 pitched up uncontrollably in the climb, he had the instinct to raise the flaps (he was pushing for all he had, flaps up= pitch down. Smart kid). Just barely controllable he flew to an old abandoned mine strip just to the southwest (I used that strip for "engine out, off airport training"). No flap, no elevator landing, he cleaned out the debris. Took off flew back to Page. Gave him the next two days off because his pecks and arms were so sore from pushing.
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Re: All (partially anyway) Jammed up

akgreg wrote:I’m pretty sure that area has a no brush cutting policy. I will be forwarding these photos to the proper authorities.
Sorry but rules are rules.


So does that mean Cory violated policy [-X
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Re: All (partially anyway) Jammed up

Wow. Thanks for sharing! That is really a good lesson that thankfully you walked away from.
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Re: All (partially anyway) Jammed up

Really good lesson - good on you for sharing this. =D>

I try to always finished do pre-takeoff checks, but sometimes when I am doing a lot of landings on riverbeds (like dozens for the day), I get slack... This is a powerful lesson.

I am sure everyone's checks include "Controls Full and Free".
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Re: All (partially anyway) Jammed up

It can't always happen but a pretty good rule of thumb is: if your wing is out over the brush when you start your turn then the tail is in danger of hitting it. Plus holding back on the elevator like normal grabs pretty good. I have had smaller willows etc but nothing the size of your greasewood!

Did you need to change your bottom cushion upholstery??? :shock:
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Re: All (partially anyway) Jammed up

G44 wrote:If its flying DON'T change or mess with the configuration! Go to nearest suitable runway and land in the configuration you are already in. Sometimes as pilots we get into the "fix it" mode when a landing would be a better choice.

Im glad to hear this had a good outcome.

Kurt

PS not to criticize how you handled it but to give others something to think about. Good job!


This ^^

and ""Fourth, probably a good idea to do one last control check before power application when maneuvering around anything that has the potential to get stuck in the tail."

I haven't been religious about that. I will be now.

CAVU
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Re: All (partially anyway) Jammed up

TangoFox wrote:It can't always happen but a pretty good rule of thumb is: if your wing is out over the brush when you start your turn then the tail is in danger of hitting it. Plus holding back on the elevator like normal grabs pretty good. I have had smaller willows etc but nothing the size of your greasewood!

Did you need to change your bottom cushion upholstery??? :shock:


Hey Trent. Haha! Since it was partially jammed in a nose up attitude, it didn’t get me too wound up. I knew I was climbing and that it was controllable with pitch. I got the takeoff and climb out on video from the cockpit. I was more concerned about how the landing was going to go. That ended up being a little more exciting...but manageable. I wish I would have gotten that on video because that would have been interesting to watch back!
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Re: All (partially anyway) Jammed up

CAVU wrote:
G44 wrote:If its flying DON'T change or mess with the configuration! Go to nearest suitable runway and land in the configuration you are already in. Sometimes as pilots we get into the "fix it" mode when a landing would be a better choice.

Im glad to hear this had a good outcome.

Kurt

PS not to criticize how you handled it but to give others something to think about. Good job!


This ^^

and ""Fourth, probably a good idea to do one last control check before power application when maneuvering around anything that has the potential to get stuck in the tail."

I haven't been religious about that. I will be now.

CAVU


Me too!

Cary
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