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  • Product Help - Fastener Kit Installation

    BEFORE GETTING STARTED

    Every attempt has been made to ensure that kits contain the correct fasteners for the subject aircraft. The listing of parts for each kit has been compiled from the manufacturer's parts list for your make, model and serial number of aircraft. However, there may be inconsistencies or alterations that were not accounted for in the kit. Some kits include extra parts to compensate for these inconsistencies. Before you begin removing components from your aircraft, compare the items in the kit with the items currently installed on your aircraft. We suggest that you lay out a sample of each item from the kit on a workbench. Using the appropriate 'REMOVAL AND INSTALLATION' information as a guideline to the parts and probable location, remove a longer stud first and match it with the stud from the kit. Make a note of the stud's location as it pertains to your specific aircraft. In kits containing several lengths of studs, this process will quickly identify any potential inconsistencies not accounted for in the kit.

    REMOVAL AND INSTALLATION

    CAMLOC FASTENERS: When using Camloc fasteners, DO NOT attempt to remove the stud's cross pin. Studs are removed by depressing the stud enough to allow it to be removed from the hole in the panel or the grommet.

    With the 2600/2700 series Camloc studs there are no special tools required. Simply remove the stud retainer (if installed) with a small pick tool, then depress the stud with your fingers and remove it from the hole.

    In the case of the heavy-duty 4002 series Camloc studs, you will notice that they use a grommet, which acts as a stud retainer. The grommet is retained in the panel by a snap ring (R4G standard or R4T high shear). The studs are removed from the grommet by using a special Camloc Pliers to depress the stud and allow it to be extracted from the grommet. The Camloc Pliers are required for removing and installing 4002 series Camloc studs, as the spring tension for these studs is very stiff.

    The grommets may be removed by using a curved pick tool to get under the snap ring and pop it off. The R4G standard retainer can be removed fairly easily. In the case of the R4T high shear retainer, significantly more effort is required. The supplier recommends modifying a good pair of snap ring pliers to expand the snap ring enough to work it free with a picking tool. As there is currently no tool available for this purpose, you may use a good snap ring tool that is ground on each side so that the jaws are thin enough to engage the snap ring. They recommend tapering the grind rearward so that the tool can better grip the ring when expanded. Grind the nose of the tool so that the jaws will be fully inserted into the grommet groove and get the best possible grip on the ring itself. The R4T retainer is very difficult to remove without the proper tools. With a carefully prepared snap ring tool and some technique these retainers can be removed efficiently. To replace the 4002 series Camloc studs and grommets, install the new grommets and secure them with the appropriate snap ring. If your aircraft requires more that just a few grommets you may want to use a snap ring installation tool. Install 4002 series Camloc studs by depressing them with the Camloc Pliers and angling them through the grommet. Once installed in the grommet the studs are self-retaining.

    DZUS FASTENERS: Almost all Dzus installations utilize a grommet, which acts as a retainer for the stud. By working the grommet from the backside of the panel and bending inward enough to slide through the panel thus removing the stud with it, you can remove this permanent grommet. Reinstallation of new grommets requires special tooling. A separate tool set for each size and head style is required. See 'TOOLING REQUIREMENTS' below. In order to lift the aluminum grommet material from the backside of the panel, you can use a nail cutting type of tool or a large end cutting pliers. Please take special note that old, bent and rusted spring receptacles will hinder proper fit and the engagement of new Dzus studs, especially stainless studs that are generally softer than the steel studs being replaced. Replacement spring receptacles are available.

    AIRLOC FASTENERS: Airloc studs are removed by pressing out the stud's cross pin. The cross pin serves a dual function as a locking mechanism and also as a stud retainer. Cross pins must be removed before the Airloc stud can be removed from the hole in the panel or the grommet. Airloc studs must be inserted through the hole or grommet before the cross pins are pressed in place. Panels that use grommets may or may not require replacement of the grommets depending on wear and current condition. Special tooling is required if the replacement of the grommets is determined to be necessary. See 'TOOLING REQUIREMENTS' below. The removal and installation of Airloc cross pins can be done with a properly modified set of vice grip pliers. The supplier recommends grinding a notch in one of the jaws of the vice grip pliers to provide relief for one side of the pin. Vice grip pliers are required to allow enough leverage to press the cross pins in and out. You may want to place protective tape on the inside jaws of the pliers to prevent scarring or damaging the Airloc stud's shank.

    TOOLING REQUIREMENTS: Special tooling for the installation of any of these kits is generally available. Some tools are in stock and others will require a special order. The cost for these tools may run as high as $50 or more. We attempt to stock the more common Camloc, Dzus and Airloc tools for your convenience.

    You must have the Camloc Pliers to remove and install the 4002 series Camloc studs.

    You must have the proper tool set for each Dzus grommet to be replaced.

    You must have the proper tool set for each Airloc grommet that needs to be replaced.

    IMPORTANT INSTALLATION NOTICE: After removing and replacing all fasteners using the appropriate tools and techniques, always check for proper cowling alignment and stud engagement. All studs should fit secure when engaged, fit flush with the cowl or grommet and not fall from the cowl when unlocked. If studs won't engage DO NOT force them. Use a longer stud if available or remove shims from the receptacle if possible. Check the receptacle contour. If studs protrude when locked use a shorter stud if available or add shims to the receptacle if possible.

    A certified A&P mechanic must complete conversion kit installations and appropriate logbook entries are required for ALL installations. Conversion kits for Beechcraft aircraft are not STC approved and are provided by request of A&P mechanics to replace less desirable fastener designs. Proper logbook entries and the completion of FAA Form 337 are the responsibility of the installer and the aircraft owner.

    Performance Aero, Inc. provides these suggested installation steps without any assumption of liability on our part. Appropriately trained and certified personnel are required for the installation of all aircraft parts. If you choose to complete the installation yourself using these steps, you are solely responsible for the results.

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