PDA

View Full Version : Control surface mounting hardware kits?



Andrew K
05-19-2008, 12:20 PM
Where can I find a kit (or individual part numbers) for the various hardware used to mount our control surfaces? Or are these just individual bolts washers and castle nuts that you can pick up from an aviation hardware place? Mine have seen better days.

Thanks!

Steve Pierce
05-19-2008, 12:38 PM
Univair has kits for Cub and Super Cub wing attach, landing gear etc. Haven't seen any for the control surfaces. Looking at my bins AN394-41 clevis pins for the ailerons and flaps, AN394-55 for the tail surfaces. They are also called out in the parts manual. It would probably nice to come up with a hardware list. Always missing at least one part to reassemble.

Glen Geller
05-20-2008, 12:14 AM
Andrew, are you telling us that the aileron, elevator and rudder hinge pins on your plane are actually bolts with castle nuts?
Hunt down the person who did the last annual and demand your money back!

Andrew K
05-20-2008, 09:18 AM
Hmm, I might have used the wrong term when describing the hardware but now you are making me second guess myself. :?

Hillbilly
05-20-2008, 10:22 AM
Hmm, I might have used the wrong term when describing the hardware but now you are making me second guess myself. :?


What was your first guess? :mrgreen:

Glen Geller
05-20-2008, 10:52 AM
As Steve indicated earlier, the hinge pins are technically Clevis Pins, with a washer at each end and cotter pin. See his post or your parts manual for correct PNs for your plane.
Actual nuts and bolts would be a bad thing, as the motion of the control surfaces could snug up the nuts and bind the controls.
If you've ever had your nuts snugged up you know just how uncomfortable that can be.

Bultaco Jim
05-20-2008, 01:17 PM
I don't mind my bolt being snug.

Hillbilly
05-20-2008, 04:22 PM
I don't mind my bolt being snug.

Apples and oranges Jim, anything less than 1/4" in diameter is not a bolt, its a machine screw. :lol:

Bultaco Jim
05-20-2008, 07:16 PM
How did you know?!!!

Hillbilly
05-20-2008, 07:42 PM
How did you know?!!!

LOL, sorry I couldn't resist. My sense of humor overtakes the part of my brain that says "no, don't do it"
You can only imagine how much trouble that has caused, especially at church...

Glen Geller
05-21-2008, 01:07 PM
Jeez, I post one silly little joke and you guys dive full throttle straight into the gutter.

I love this group!

Bultaco Jim
05-21-2008, 08:08 PM
We would need a rocket ship to get up to the gutter!

Andrew K
06-01-2008, 08:14 PM
Got out to the plane a while ago to double check the plane but just now getting around to reply. You guys are correct, I meant "hinge pin" during the original post.

Though the control cables running to the ailerons appear to have a bolt with a castle nut and cotter pin. Are these also supposed to have pins or are they correct as is?

While on the subject, a final rookie owner question: Can I change out the hardware or do I need to have an A&P do it, or at least monitor the work and make a log book entry?

Thanks again,
Andrew

Gilbert Pierce
06-01-2008, 08:35 PM
Here is what you as a licensed pilot and owner of the airplane can do legally. Read it then tell us if you rated to change the control surface hinge pins.
Reference Far Part 43 Appendix A. http://rgl.faa.gov/REGULATORY_AND_GUIDA ... enDocument (http://rgl.faa.gov/REGULATORY_AND_GUIDANCE_LIBRARY/RGFAR.NSF/0/AC9BED30F1D032B9852566AB006BC89C?OpenDocument)

Preventive maintenance. Preventive maintenance is limited to the following work, provided it does not involve complex assembly operations:
(1) Removal, installation, and repair of landing gear tires.
(2) Replacing elastic shock absorber cords on landing gear.
(3) Servicing landing gear shock struts by adding oil, air, or both.
(4) Servicing landing gear wheel bearings, such as cleaning and greasing.
(5) Replacing defective safety wiring or cotter keys.
(6) Lubrication not requiring disassembly other than removal of nonstructural items such as cover plates, cowlings, and fairings.
(7) Making simple fabric patches not requiring rib stitching or the removal of structural parts or control surfaces. In the case of balloons, the making of small fabric repairs to envelopes (as defined in, and in accordance with, the balloon manufacturers' instructions) not requiring load tape repair or replacement.
(8) Replenishing hydraulic fluid in the hydraulic reservoir.
(9) Refinishing decorative coating of fuselage, balloon baskets, wings tail group surfaces (excluding balanced control surfaces), fairings, cowlings, landing gear, cabin, or cockpit interior when removal or disassembly of any primary structure or operating system is not required.
(10) Applying preservative or protective material to components where no disassembly of any primary structure or operating system is involved and where such coating is not prohibited or is not contrary to good practices.
(11) Repairing upholstery and decorative furnishings of the cabin, cockpit, or balloon basket interior when the repairing does not require disassembly of any primary structure or operating system or interfere with an operating system or affect the primary structure of the aircraft.
(12) Making small simple repairs to fairings, nonstructural cover plates, cowlings, and small patches and reinforcements not changing the contour so as to interfere with proper air flow.
(13) Replacing side windows where that work does not interfere with the structure or any operating system such as controls, electrical equipment, etc.
(14) Replacing safety belts.
(15) Replacing seats or seat parts with replacement parts approved for the aircraft, not involving disassembly of any primary structure or operating system.
(16) Trouble shooting and repairing broken circuits in landing light wiring circuits.
(17) Replacing bulbs, reflectors, and lenses of position and landing lights.
(18) Replacing wheels and skis where no weight and balance computation is involved.
(19) Replacing any cowling not requiring removal of the propeller or disconnection of flight controls.
(20) Replacing or cleaning spark plugs and setting of spark plug gap clearance.
(21) Replacing any hose connection except hydraulic connections.
(22) Replacing prefabricated fuel lines.
(23) Cleaning or replacing fuel and oil strainers or filter elements.
(24) Replacing and servicing batteries.
(25) Cleaning of balloon burner pilot and main nozzles in accordance with the balloon manufacturer's instructions.
(26) Replacement or adjustment of nonstructural standard fasteners incidental to operations.
(27) The interchange of balloon baskets and burners on envelopes when the basket or burner is designated as interchangeable in the balloon type certificate data and the baskets and burners are specifically designed for quick removal and installation.
(28) The installations of anti-misfueling devices to reduce the diameter of fuel tank filler openings provided the specific device has been made a part of the aircraft type certificate data by the aircraft manufacturer, the aircraft manufacturer has provided FAA-approved instructions for installation of the specific device, and installation does not involve the disassembly of the existing tank filler opening.
(29) Removing, checking, and replacing magnetic chip detectors.
(30) The inspection and maintenance tasks prescribed and specifically identified as preventive maintenance in a primary category aircraft type certificate or supplemental type certificate holder's approved special inspection and preventive maintenance program when accomplished on a primary category aircraft provided:
(i) They are performed by the holder of at least a private pilot certificate issued under part 61 who is the registered owner (including co-owners) of the affected aircraft and who holds a certificate of competency for the affected aircraft

Andrew K
06-01-2008, 08:52 PM
Thanks for that list, going to print it and leave a copy in the POH for my future reference.

Sounds like according to the FAA I am not qualified to do this work on my own. Several points mention not disconnecting control cables and/or the removal of the control surfaces. Though I could do one hinge at a time and technically not remove the control surface... :lol: I'll assume the FAA wouldn't appreciate my technical loop holes.