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buzzfink

How important is the maintenance of Skydiving Aircraft to you?

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My brother works in the hanger where our jump aircraft get worked on.
He jumps out of them, and hasn't told me not to....that's good enough for me!!!;)
xj

"I wouldn't recommend picking a fight with the earth...but then I wouldn't recommend picking a fight with a car either, and that's having tried both."

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[replyWhich commonly used jump planes are required to have this? I know the Casa is way over that weight limit, is an Otter? How about planes like the Skyvan?



Twin Otters are not over 12,500lbs, therefore they are NOT required to be able to climb on one engine. In any aircraft over 12,500lbs(certificated after a certain date - I believe 1964 - anybody else sure of the exact year/date or if it applies to the aircraft in question?), it is illegal to take off at a weight greater than that which would allow a climb on one engine - equal to a 1.6% climb gradient(this is net gradient, for those pilots that understand what I'm saying), which equals, IIRC, 152 feet per nautical mile(that means every 6,076ft traveled horizontally, the airplane should climb 152ft - NOT MUCH!). BUT, you must realize, these numbers are based on a brand new airplane with brand new engines(since these tests were done when the airplane was first certified) - so older airplanes with older engines are not likely to meet this. There IS a fudge factor built in, and it is usually enough to account for these factors, but not always.

A popular pilot saying is...."In a twin engine airplane, when one engine fails, the remaining engine will take you to the scene of the crash".. Unfortunately, that is because most pilots of multi-engine aircraft are not current/proficient in single engine procedures. This is why recurrent training is required every 6 months for most of us - but that does not apply to jump pilots.

The Casa and Skyvan are over 12,500lbs, but I don't know what year they were certificated - so I'm not 100% sure what requirements apply to them. I am pretty damn sure that the rules I stated above DO apply to them. If in doubt, as the pilots flying them. They will have a TYPE RATING(a specific rating that is required for the Captain in any aircraft over 12,500lbs MGTOW or jet powered) in the aircraft, and should know the applicable requirements.

Mike

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In my experience, the jumpers that are most concerned about aircraft safety are the ones that are pilots themselves. The skydivers that aren't pilots (myself included) wouldn't know how to read a maintenance report, even if it was posted in the front door of the DZ. From the things I've heard pilots say about DZ aircraft, it's probably a good thing that I don't know what's wrong with them - it would probably stop me from jumping altogether.

Here's a question for you pilot types - are commercial, passenger aircraft subject to more FAA scrutiny (more inspections, more maintenance, et al) than say a typical skydiving plane? I don't exactly ask for maintenance reports when I get on Delta, either ;)
Trapped on the surface of a sphere. XKCD

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3k? Wimps. 1k



If you start at 3K, claw your way over the jumpers vying for the door, open the door and actually get out, you'll probably be at 1K anyway. Now if I'm already hanging outside at 1K, no problem. Maybe we should all just float the takeoff? :P
Trapped on the surface of a sphere. XKCD

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Here's a question for you pilot types - are commercial, passenger aircraft subject to more FAA scrutiny (more inspections, more maintenance, et al) than say a typical skydiving plane? I don't exactly ask for maintenance reports when I get on Delta, either



Most typical skydiving aircraft are being operated as a commercial operation under FAR Part 91 regulations.

Commercial airlines in addition to following the rules in FAR Part 91 also comply with a more rigid set of regulations in FAR Part 135. More rigid not just in aircraft maintenance, but also the general way in which things are operated and crew training.

You are orders of magnitude safer on a commercial airliner than a typical skydiving aircraft.
quade -
The World's Most Boring Skydiver

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For those of you that snigger at cessna DZ's, they are typically saver in the event of an engine failure than a light twin. Single engine aircraft glide. Light twins - unless flown well given an engine failure - have a tendency to enter 'pin your arse to the inside of the cabin so tight that you can't even kiss it goodbye' kinda death spins.

The only thing worse than a cold toilet seat is a warm toilet seat.

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Looks like the Shorts Skyvan is not required to climb on one engine since its Max Gross take off is 5670kg (12,500lb). The way I read the history of the plane is that it was certified with the Garrett turboprops in '67 but it is a light enough plane it does not have the climb requirements.

The Casa has a max takeoff of 6300kg (13,890lb) and in speaking to the pilots I know that its required and has climbed out on one engine before.
Yesterday is history
And tomorrow is a mystery

Parachutemanuals.com

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Like others who have said things here, I'm a pilot and also work in the field of aviation safety. Whenever I fly, there is almost always an "out," and I've had to use that last out once - a rocket assisted aircraft exit from an aircraft in extremis. When I climb into an aircraft, I need to be confident that it will get me to a point where I can get out of it, or until it reaches that point, it will hold together and perform well enough to keep its occupants alive. When an jump aircraft takes off, until it reaches a safe, jumpable altitude, the occupants are putting their lives in the hands of the pilot and the folks who have done the maintenance work on that aircraft.

FunBobby

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Looks like the Shorts Skyvan is not required to climb on one engine since its Max Gross take off is 5670kg (12,500lb). The way I read the history of the plane is that it was certified with the Garrett turboprops in '67 but it is a light enough plane it does not have the climb requirements.



Hmmm....I always thought the Skyvan was over 12,500...maybe there are some variants of it that are, but the original is not.. Then again, maybe I'm just mixing it up with the specs on other models of Shorts aircraft. I'll have to ask at Deland next time I'm there and talk to the Skyvan pilots.

Mike

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Looks like the Shorts Skyvan is not required to climb on one engine since its Max Gross take off is 5670kg (12,500lb). The way I read the history of the plane is that it was certified with the Garrett turboprops in '67 but it is a light enough plane it does not have the climb requirements.



Hmmm....I always thought the Skyvan was over 12,500...maybe there are some variants of it that are, but the original is not.. Then again, maybe I'm just mixing it up with the specs on other models of Shorts aircraft. I'll have to ask at Deland next time I'm there and talk to the Skyvan pilots.

Mike


Aviator is right about light a/c and single engine climb. The only requirement for an aircraft under 12,500 lbs certifcated under far 23 is that it maintain directional cotrol.
The mx requirements for aircraft operated under Far 121/119-Scheduled airlines and 135-Air taxi are more stringent than far 91 under which jump planes are flown. One example, TBO's[time before overhaul] on components like engines and props are not binding for 91 operators as they are for the airlines and charter guys. As far as engines not making their rated power as they age. It is my understanding that all aircraft engines are required to produce their published takeoff torque or they are broken. Referance Far 91. 7 [aircraft airorthiness] Tom

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Returning to the original topic ...
Why is it that when some skydivers see a mechanic near a jump plane on Saturday morning, that they turn all sorts of funny colors and refuse to board the airplane, while people like me refuse to board airplanes that mechanics have NOT looked over recently?

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If it was flying fine yesterday and nobody's touched it since then, it'll fly fine today. :)
Dave



If you do major reconstructive work on any aircraft the pilot should take it out for a solo test flight anyway. That's what I always did. Any prop or engine work got a solo flight.
Chris Schindler
www.diverdriver.com
ATP/D-19012
FB #4125

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