Cessna 310 Down in Boca Raton

I am curious. If you do flight control checks on the ground and this was something related to annual, the rudder should lock in place then right? Meaning flight controls should not be clear? If the bell crank separated it was either separated before flight control check or when the flight controls were checked. I would imagine it’s not clear on the ground and then separates in air? I’m trying to understand if they did a flight control check on ground would this have been caught.
 
I am curious. If you do flight control checks on the ground and this was something related to annual, the rudder should lock in place then right? Meaning flight controls should not be clear? If the bell crank separated it was either separated before flight control check or when the flight controls were checked. I would imagine it’s not clear on the ground and then separates in air? I’m trying to understand if they did a flight control check on ground would this have been caught.
Checking to see if the pedals move freely without watching the rudder is rather futile, but we won't ever know when the parts separated.
 
Rudder and pedals do not move freely on the ground; they are tied to the nose gear. How are you gonna check that flight control, other than turning during taxi?
 
Rudder and pedals do not move freely on the ground; they are tied to the nose gear. How are you gonna check that flight control, other than turning during taxi?
The 310 nose gear is controlled through bungees. I will need to dig out the books when I’m home to refresh my memory of how the rest of the system is rigged. But I would compare taxiing the 310 to a taildragger with springs linking the rudder to the tailwheel. You push the pedal and feel some resistance from the bungee system, which decreases as the nose wheel pivots. You can turn sharper (but not quite as sharp as with free castering gear) with the brakes and differential thrust.
 
The rudder on a 310 is easy to check on the ground. You can get full left and right travel.
Did this on a C310R days ago in a hanger. Rudder moved both ways. Mechanic said although the rudder did move by hand the rudder pedals did not. Felt like bungee resistance when moved. We were discussing this crash. He thought some tools were left in tailcone perhaps . Corrosion a factor?

C310R Rudder Bellcrank
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Would that result in a hard-over rudder? You (I) wouldn't think so, but I've never looked inside a 310.

Switching possibilities, is it possible to reverse the rudder trim on a 310, such that the more "right" trim they applied, the more left trim they actually got? I'm sure rudder trim on a 310 is very powerful to handle engine out scenarios.
Maybe I am reading it wrong, but it sounded to me like the rudder trim was 21 degrees left rudder and the right rudder was not connected (bell crank broken).

First thought that came to mind on a first flight after annual was the rudder trim was left at 21 degrees left rudder and no one caught it on preflight and then somewhere in the takeoff the right rudder bellcrank failed. If the airplane was in a continual left turn the entire time it was airborne, I don't think the left trim was added/applied during the flight.

What am I missing?
 
So... pure speculation on my part, but with a stuck control surface, the trim tab has the opposite effect. Could it be that they tried to turn right by cranking rudder trim to the left?
 
So... pure speculation on my part, but with a stuck control surface, the trim tab has the opposite effect. Could it be that they tried to turn right by cranking rudder trim to the left?
That's a possibility someone mentioned on BeechTalk. The rudder was jammed and perhaps they were trying to use the trim as a mini-rudder.

It makes a little sense. It seems they were trying to use the aileron trim to create a right roll. I have a hard time thinking they would have the presence of mind to manipulate the aileron trim, but never check the rudder trim if it was left at the start.
 
so how to make sure u r safe?
If you have been trained properly, and paid attention during that training, you will do a proper preflight inspection. That preflight involves moving each control surface from stop to stop, unless the rudder is connected to the nosegear steering with hard links such as with some Pipers. Most Cessnas use spring bungees between the rudder pedal bars and nosegear, and those bungees will try to re-center the rudder to whatever position the nosewheel is in. If they don't, you have problems. A broken rudder bar return spring, broken bungee spring, a failed cable, something that needs urgent attention. If you move the elevator up and down while standing at one end of it, you can watch the control wheels ("yokes", as some mistakenly call them) move. Same with the ailerons.

Now, if you do all that, how could you possibly miss external gustlocks still in place?? And if you don't do it, your training was deficient, or you have become complacent, and Complacency is one of the Dirty Dozen accident factors.

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Checking to see if the pedals move freely without watching the rudder is rather futile, but we won't ever know when the parts separated.
Taildraggers are most often steered by attachment to the rudder or the aft sections of the rudder cables or to bellcranks in the aft tailcone. If you can't steer the airplane on the ground, cancel the flight instantly. This is not rocket science. Nosedraggers with rudder-related steering could have an unseen problem, but the feel of ths system should be off. A pilot could develop the habit of working the rudder just after opening the throttle for takeoff, there should be prompt and unmistakeable yaw and the back pressure should have risen.

Broken cables and bellcranks are rare except in poorly-maintained and cared-for airplanes. Cheap, quick annual inspections and lousy tiedown practices, and yes, you could have regrets.
Rudder and pedals do not move freely on the ground; they are tied to the nose gear. How are you gonna check that flight control, other than turning during taxi?
As above. Cessna's steering is springy, Piper's isn't. If they're stiff during taxi, you have a BIG problem.

So much of this is just another of the Dirty Dozen: Lack of Awareness. A fellow instructor was about to fly a friend's old 180, but as he moved the ailerons during the preflight he could hear scratching sounds coming from inside the airplane. He cancelled his plans. He was Aware, see? An aileron cable was found to be so badly frayed in the cabin ceiling that broken wires were sticking out far enough to scratch the roof skin. That airplane was getting cheap annuals. That fraying took years to develop, not just a few months, and nobody caught it. The owner of the airplane was not in the habit of preflighting, either.
 
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So... pure speculation on my part, but with a stuck control surface, the trim tab has the opposite effect. Could it be that they tried to turn right by cranking rudder trim to the left?

I read it as they broke both trim cables trying.
 
Broken cables and bellcranks are rare except in poorly-maintained and cared-for airplanes. Cheap, quick annual inspections and lousy tiedown practices, and yes, you could have regrets.

I know the plane and pilot. Neither of these were the case.
 
I know the plane and pilot. Neither of these were the case.
In fairness, neither of these is more than remotely likely, but they can’t be completely ruled out based only on your knowledge.

What was missed in the annual inspection that had just been completed? What could the pilot have done as part of the before engine start or before takeoff checklists to catch this failure mode before applying takeoff power? Did the failure happen early enough in the takeoff to pull back the throttles and take a ground loop at 90 knots instead of fighting a battle for his life in the air?

As a 310 operator, I am eager to answer these questions. That is doubly true because I will never be half the pilot Mr. Stark was, so my only chance is to catch the problem on the ground. Maybe this one wasn’t catchable but, if it was, I want to know how to catch it.
 
Did this on a C310R days ago in a hanger. Rudder moved both ways. Mechanic said although the rudder did move by hand the rudder pedals did not. Felt like bungee resistance when moved. We were discussing this crash. He thought some tools were left in tailcone perhaps . Corrosion a factor?

C310R Rudder Bellcrank
View attachment 140851
Can you describe the attachment bracket, and it's method of attachment to this?
I'm not following the nature of the failure and plausible sequence of events.
 
In fairness, neither of these is more than remotely likely, but they can’t be completely ruled out based only on your knowledge.

What was missed in the annual inspection that had just been completed? What could the pilot have done as part of the before engine start or before takeoff checklists to catch this failure mode before applying takeoff power? Did the failure happen early enough in the takeoff to pull back the throttles and take a ground loop at 90 knots instead of fighting a battle for his life in the air?

As a 310 operator, I am eager to answer these questions. That is doubly true because I will never be half the pilot Mr. Stark was, so my only chance is to catch the problem on the ground. Maybe this one wasn’t catchable but, if it was, I want to know how to catch it.

I'm confident my knowledge of plane and pilot is sufficient to rule out "cheap, quick annual inspections and lousy tiedown practices". That's just garbage talk.

100% agree with your viewpoint on finding out why, and whether it was catchable. My hunch is that it will turn out to be something more insidious, and would have required extra steps beyond normal preflight and annual checks to find.
 
Can you describe the attachment bracket, and it's method of attachment to this?
I'm not following the nature of the failure and plausible sequence of events.
No I can't. Just posted picture to see what a 310 rudder bell crank looks like. I'm just guessing but possible detachment would be the metal plates riveted to bell crank hence my question about corrosion.
 
It's possible the attach bracket rivets were sheared by force applied by the pilots, and that the rudder was jammed by some other cause. Note the preliminary states those rivets displayed no fretting.
 
Rudder and pedals do not move freely on the ground; they are tied to the nose gear. How are you gonna check that flight control, other than turning during taxi?
I had a preflight on this Cherokee 180 where I rent where the rudder moved freely on the ground. Obviuously that was abnormal. I always check if the rudder moves freely. On this airplane some bracket broke that connects the pedals to the wheel and rudder. IDK what would have happened if I took off like that.
 
Even if you can't see the rudder, or you can't move it because it's rigidly tied to the nose wheel, you should be able to tell it's rigged right as soon as you start the take off roll.
Yeah, I'm going to be adding a rudder wiggle right after lift off to my takeoff. The nose wheel will be free of the ground & you will know immediately if there is an obvious issue. Then I can pull the power and land in what's left. Even the chance of overrunning the runway is better than flying with a bad rudder.

I'm not sure if I can see the rudder without opening the door. I'll check when I fly today. Either way, I can taxi with the door on the kick stand (open a little) and check the rudder while turning to verify it moves. The rudder wiggle on takeoff is still probably a good idea too.
 
Speaking of doors, I wonder how effective it would be to add right “door rudder” in a situation like this. I know it’s also a big, draggy airbrake and performance is critical, but could it be in the toolbox, especially if you have someone able in that seat to manipulate it?
 
Speaking of doors, I wonder how effective it would be to add right “door rudder” in a situation like this. I know it’s also a big, draggy airbrake and performance is critical, but could it be in the toolbox, especially if you have someone able in that seat to manipulate it?
It certainly works on the singles.
 
We were in the taxi out phase in a B737-300. Did the control check. Full right aileron, control stuck there. It would not return. Taxied back to gate. We had just flown the airplane in. Scary.
 
Speaking of doors, I wonder how effective it would be to add right “door rudder” in a situation like this. I know it’s also a big, draggy airbrake and performance is critical, but could it be in the toolbox, especially if you have someone able in that seat to manipulate it?

I'm not sure at flying speeds you'd have the strength to create much effect. Not to mention in an already stressful situation you now have an open door in flight, which pilots have let kill them too.
 
I'm not sure at flying speeds you'd have the strength to create much effect. Not to mention in an already stressful situation you now have an open door in flight, which pilots have let kill them too.

I spoke to one of the guys who was on the radio with the pilot. It was insanely stressful. They were right on the verge of losing control the whole time. Several times he announced they were "going in", then averted it.
 
I spoke to one of the guys who was on the radio with the pilot. It was insanely stressful. They were right on the verge of losing control the whole time. Several times he announced they were "going in", then averted it.

It does sound like they fought a good fight all the way to the end. Compared to other crashes where pilots have failed a perfectly good airplane.

This has always been my nightmare scenario as a pilot, stuck in an airplane I can't control, just waiting for the inevitable.
 
It does sound like they fought a good fight all the way to the end. Compared to other crashes where pilots have failed a perfectly good airplane.

This has always been my nightmare scenario as a pilot, stuck in an airplane I can't control, just waiting for the inevitable.
The way they flew meaning both pilots, flying sideways, I’d of auger in at the end of runway.
 
I spoke to one of the guys who was on the radio with the pilot. It was insanely stressful. They were right on the verge of losing control the whole time. Several times he announced they were "going in", then averted it.
I always feel compassion for those lost, and doubly so for their families and friends. This accident has magnified those thoughts. They fought with all of their might, and I feel great respect, yet much sorrow.

As it is said, fate decrees, and we must obey. But it is a hard master.
 
Can you describe the attachment bracket, and it's method of attachment to this?
I'm not following the nature of the failure and plausible sequence of events.
My understanding is that the bracket is the piece attached to the bellcrank by six rivets, and those rivets failed in shear.

I commented above 'It's possible the attach bracket rivets were sheared by force applied by the pilots, and that the rudder was jammed by some other cause. Note the preliminary states those rivets displayed no fretting.'

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I spoke to one of the guys who was on the radio with the pilot. It was insanely stressful. They were right on the verge of losing control the whole time. Several times he announced they were "going in", then averted it.
Jesus! And with your child in the backseat...


Educate me.
Why were they not able to climb? I think even with a full rudder deflection in my plane, I could get altitude. Haven't tried it but isn't a 310 a pretty powerful plane?
 
I remain skeptical of the implied statement of no fatigue crack progation evidence, based on just naked eye observation. A few rivets are not an entire spar failure; you're gonna have to go micro on that small of a surface mating area. Fretting fatigue is definitionally a shear boundary/microscopic process anyways.

Now, as my own experience with thrubolts showcased a few years ago, cascading overload failures will be present on the succeeding fasteners, while the first one still failed in fatigue. So just because they may have theoretically found the lion share of the rivets sheared in overload, doesn't mean that was the root failure modal cause. If you fail some in fatigue, the others will cascade in overload if they exceed their safety factor, definitonally.

I'm gonna further speculate that they didn't gratuitously decide to stomp on the rudder on the ground with such force so as to shear-overload the right cable attachment off the bellcrank prior to takeoff; ditto for doing so immediately after takeoff. Some fastener components within the right side assembly attachment must have failed inside their ultimate load design. That ought to be of grave interest to every antiquey twin lawnmower owner out there, 310s in this case.
 
Jesus! And with your child in the backseat...


Educate me.
Why were they not able to climb? I think even with a full rudder deflection in my plane, I could get altitude. Haven't tried it but isn't a 310 a pretty powerful plane?
The 310R has 285 hp per side unless it has been upgraded. They weren’t heavy, either. But I don’t know how the plane would handle with full rudder deflection, and have no interest in finding out. They may had to reduce power on one side to maintain any semblance of control. Or they may have wanted to stay at pattern altitude so they wouldn’t have to descend to land.
 
We were in the taxi out phase in a B737-300. Did the control check. Full right aileron, control stuck there. It would not return. Taxied back to gate. We had just flown the airplane in. Scary.
I had a similar thing in the MD-11 leaving Guangzhou, China. For the control check, we watch the aircraft synoptic page. As the flight control surface moves, a white outline of the surface appears on the synoptic until it reaches full travel, then the box fills in green. If the pilot doing the check can't get a green box, the procedure was to have the other pilot try it, and if they can't get the green box to appear, then both pilots can simultaneously move the control and try to get the box greened. So when I turned the yoke to the right, I got 3 green boxes, but the outboard aileron box on the right wing wouldn't indicate full deflection. The Captain tried it, same result. We both tried it together. Nope. Taxi back in thinking it was just a sensor problem. We'd get an MEL and be on our way.

After we pull into the chocks, maintenance pulls a stand up under the wing to do their thing. A few minutes later, the Chinese mechanic comes up and says "you need to come see this." We shrug and go down to the ramp and climb up the stand where they had dropped some panels under the aileron in question. The mechanic shines his light on the sidewall where the bracket holds the aileron in place. The bracket in just hanging there askew, with three of the four attachment bolts completely missing and the fourth bolt is backed out halfway or more and just sitting at an angle looking like its going to fall out at any moment.

That plane had just flown in from Sydney a few hours prior.
 
DanThomas said:
As a mechanic I have had the privilege of repairing wind-damaged control surfaces and systems. It's a real risk. The control column gust locks might limit the control surface movement, but the cables and pulleys are still taking loads and moving slightly, and suffer wear. I remember replacing the cables in a 30?-year-old Cessna 180 floatplane with only 1100 hours total time on it. Parked in an open-sided hangar using just the control column lock. The cables were all worn where they passed over pulleys and fairleads. All the hinges were worn. The wind did that.

I have seen smashed control surface travel stops. Seen bent aileron pushrods due to the sudden stop of a mass-balanced aileron against the bellcrank stop. Seen damaged flaps in an older Maule; spring-loaded-return flaps are famous for that.
THIS.

Do a better preflight or hangar that puppy. For me the hangar is a matter of survival.
Flying with the left engine only on departure, to counteract left full rudder is indeed unlikely to have a good outcome.
 
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I had a similar thing in the MD-11 leaving Guangzhou, China. For the control check, we watch the aircraft synoptic page. As the flight control surface moves, a white outline of the surface appears on the synoptic until it reaches full travel, then the box fills in green. If the pilot doing the check can't get a green box, the procedure was to have the other pilot try it, and if they can't get the green box to appear, then both pilots can simultaneously move the control and try to get the box greened. So when I turned the yoke to the right, I got 3 green boxes, but the outboard aileron box on the right wing wouldn't indicate full deflection. The Captain tried it, same result. We both tried it together. Nope. Taxi back in thinking it was just a sensor problem. We'd get an MEL and be on our way.

After we pull into the chocks, maintenance pulls a stand up under the wing to do their thing. A few minutes later, the Chinese mechanic comes up and says "you need to come see this." We shrug and go down to the ramp and climb up the stand where they had dropped some panels under the aileron in question. The mechanic shines his light on the sidewall where the bracket holds the aileron in place. The bracket in just hanging there askew, with three of the four attachment bolts completely missing and the fourth bolt is backed out halfway or more and just sitting at an angle looking like its going to fall out at any moment.

That plane had just flown in from Sydney a few hours prior.


Sounds like you missed an opportunity to have your own episode on “Air Disasters”......
 
THIS.

Do a better preflight or hangar that puppy. For me the hangar is a matter of survival.
Flying with the left engine only on departure, to counteract left full rudder is indeed unlikely to have a good outcome.

The accident aircraft was hangared.
 
oof. that hurts.
I lived one year outside in the late 90s with the Seneca. The airframe took a BEATING that year.
 
JFC why take a twin or any plane up first flight after an annual with family? why?
Sounds like pilot took off with rudder trim fully deployed left.

Juan's report.
 
Sounds like pilot took off with rudder trim fully deployed left.
And, perhaps, tried to adjust the rudder trim to the right but, too busy fighting the airplane, turned the aileron trim instead.
 
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