Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F

accordance with the aircraft manufacture’s procedures. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 6 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 5.0 Tire Check 5.1 Verify the main wheel tires size is 8.50-6. 5.2 Inflate tires to maximum manufacturer’s recommended pressure. 5.3 Ensure the main gear axles are parallel to the floor by rolling the airplane back and forth 6 to 10 feet, while checking the alignment according to aircraft maintenance manual. Always finish by pulling forward. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 7 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 6.0 Ski Axle Installation 6.1 Raise the aircraft in accordance with the aircraft manufacturer’s maintenance manual procedures. 6.2 Remove the wheel and brake assembly in accordance with the with the aircraft manufacturer’s maintenance manual procedures. 6.3 Remove the main wheel axle mount bolts. 6.4 Install the steel ski axle (CFMI P/N 3500-001) with the axle toward the inboard side of the aircraft. Note: shims maybe required to adjust for toe in or toe out conditions. 6.5 Use NAS6205-41 for the top bolts with one washer under each nut. If shims are used on the gear leg and additional grip length is needed, substitute appropriate length NAS bolt. 6.6 Use NAS6206-42 for the bottom bolts with one washer under each nut. If shims are used on the gear and additional grip length is needed, substitute appropriate length NAS bolt. 6.7 Torque all four bolts in accordance with the airplane maintenance manual procedures (Figure 1). Figure 1 - Ski Axle Installation 6.8 Reinstall brake and wheel assembly in accordance with the airplane maintenance manual procedures. 6.9 Repeat steps 6.2 through 6.8 for the opposite side. 6.10 Remove aircraft from jacks. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 8 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 7.0 Ski Installation 7.1 Grease the ski axle surfaces and slide skis onto ski axles. 7.2 Install washer, retaining nut and cotter pin. 7.3 Roll the aircraft back and forth about 6 feet each direction at least three or four times to level the wheels and end by pulling the aircraft forward. Inspect installation to ensure the ski is free to pivot. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 9 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 8.0 Ski Alignment Check 8.1 Ensure ski ground clearance is 0.50 to 0.75 inch. 8.2 Skis should be near parallel laterally (camber) to the ground with the airplane loaded for normal operation (e.g. full fuel and one person). 8.3 Check for toe-in by measuring between the two skis at the front and back ends. The dimension may narrow at the front by no more than 1 inch, and the toe-in should be equal between the left and right ski. 8.4 Shims may be installed between the ski axles and the landing gear attachment point to achieve proper alignment. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 10 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 9.0 Ski Rigging Bracket, Turnbuckle and Ski Tang Installation 9.1 At the top of the gear leg on both sides of the airplane remove the gear inspection plate (Figure 2). Figure 2 - Gear Inspection Plate 9.2 Remove the two (2) AN4 bolts and install the gear bracket (Figures 3 and 4). Figure 3 - Gear Bracket Installed (Top View) Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 11 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. Figure 4 - Gear Bracket Installed (Bottom View) 9.3 Reinstall the AN4 bolts and torque according to airplane maintenance manual. 9.4 Install the shock cord spacer assembly using the AN6-7A bolt though the top forward bracket hole into the rear clamp bracket with one washer and lock nut. The 9 inch cable should be on top (Figure 5). 9.5 Install the AN6-6A bolt through the top aft bracket hole into the rear clamp bracket with one washer and lock nut (Figure 5). 9.6 Attach the shock cords to the spacer cables. Attach the turnbuckles to the two lower holes on the forward side of the gear leg bracket. Fasten and secure with AN4-6 bolts, AN310 castle nuts and cotter pins (Figure 5). Figure 5 - Bracket Hardware Installation Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 12 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 9.7 Attach a turnbuckle to the lower rear hole of the gear leg bracket. Fasten and secure with an AN4-6 bolt, AN310 castle nut and cotter pin (Figure 6). Figure 6 - Aft Turnbuckle Installation 9.8 Repeat 9.1 to 9.7 on opposite gear leg. 9.9 Attach a two-hole bent tang to the AN5 bolt on the aft end of the ski (Figure 7). Figure 7 - Aft Two-Hole Tang 9.10 Attach two (2) three-hole bent tangs to the AN5 bolts at the front of the ski (Figure 8). Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 13 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. Figure 8 - Cable Attachment to Skis (Note Ski Positioning) 9.11 Repeat steps 9.9 and 9.10 on the opposite ski. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 14 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 10.0 Ski Cable Rigging 10.1 All skis are shipped with the necessary materials to make the rear limit, forward safety and crust cutter cables. The installer will be required to measure, cut and thimble eye splice each cable end. Review for FAA acceptable procedures for cable terminations can be found in AC 43.13-1B, Chapter 7, Section 8 Inspection and Repair of Control Cables and Turnbuckles. 10.2 The rear limit (check) cable shall provide a zero to five (5) degree positive ski incidence angle relative to level flight line of the aircraft as per AC 43.13-2B Chapter 5. 10.2.1 Due to the inward sag of the Cessna gear, you must jack the aircraft main gear off the ground and raise the tail of the airplane until between zero and 5 degrees in flight positive ski incidence angle is obtained (Figure 9). Figure 9 - Rear Limit Cable Ski Incidence Angle 10.3 Measure from the empty hole of the attached two-hole tang on the aft end of the ski to the bottom of the turnbuckle attached to the gear leg bracket (Figure 6). This is the length of your rear limit cable. Finish the custom cable fit by completing the cable ends in accordance with section 11 of this installation procedure. 10.4 Next, with the aircraft still in level flight position and referencing figure 8, measure from the empty inboard holes of the attached forward three-hole tangs to the bottom of the shock cords attached to the spacer assembly (Figure 5). NOTE: Turnbuckles are not used on Crust Cutter Cables. Subtract two inches from your measurement*; this will be your cable length. Finish the custom cable fit by completing the cable ends in accordance with section 11 of this installation procedure. *Subtracting two inches from your measurement is a starting point and should/can be adjusted to achieve the proper load set forth in step 10.4.1 and AC43.13. 10.4.1 A tension of between 40 and 60 lbs of force is required to deflect the ski tip down as per AC 43.13-2B Chapter 5. Verify that between 40 and 60 lbs of downward force at the ski tip has been achieved without causing excessive toe-in of the skis. Note: Excessive shock cord tensions may produce excessive toe-in of skis. Do not over tighten shock cords. 10.5 Now you will measure and rig the Safety Cables. The safety cable is installed to provide a maximum negative incidence of 10 to15 degrees as per AC 43.13-2B Chapter 5. 10.6 With the tail down, jack the aircraft allowing the gear legs to sag into flight position. Place 2x4 blocks under the main gear, then gently lower the aircraft so the main gear just touch the blocks. The aircraft’s weight is still being supported by the jacks and the gear is still in flight position. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 15 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 10.7 Push the front of the ski down until a maximum negative incidence angle of 10 to 15 degrees is obtained (Figure 10). Measure the negative angle of the bottom inside edge of the ski (Figure 10, Angle B). Measure the positive level flight angle at the upper door sill (per TCDS 3A24) or in accordance with the aircraft maintenance manual (Figure 10, Angle A). Use the total difference as your negative incidence. 10.8 Referencing figure 8, measure from the empty outboard holes of the attached forward three-hole tangs to the bottom of the turnbuckles attached to the gear leg bracket (Figure 5), this is the length of your forward safety cables. Finish the custom cable fit by completing the cable ends in accordance with Section 11 of this installation procedure. 10.9 Repeat steps 10.1 to 10.8 for the opposite gear leg. Figure 10 - Safety Cable Incidence angle NOTE: If the aircraft is equipped with float fittings, they may be used as cable attachment points. Cable lengths must be adjusted to maintain proper specifications as per section 10. Figure 11 - Finished Forward Ski Cables Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 16 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 11.0 Thimble Eye Splice Procedure 11.1 The cable ends will need to be finished to the lengths measured in section 10. The cable ends will need to be thimble-eye spliced using the wire rope sleeves and thimbles provided. 11.1.1 First slide the heat shrink tube onto the unfinished cable. Next slide an oval wire rope sleeve over the unfinished cable end keeping it positioned in one of the two openings (Figure 12). 11.1.2 Now loop the end of the cable through the turnbuckle and back through the other hole of the wire rope sleeve (Figure 13). 11.1.3 Attach a rigid nail or screw to an open work bench area. Place a finished cable eye over the nail so that the thimble contacts the nail; make sure the two-hole tang does not interfere with the thimble. Use the nail as a starting point for your tape measure (Figure 14). Figure 12 - Heat Shrink & Sleeve Figure 13 - Cable Loop Figure 14 - Cable Measuring Fixture 11.1.4 Stretch the tape measure out to the desired cable length. Adjust the cable end until the proper length is achieved. The thimble ends should extend into the wire rope sleeve (Figure 15). Figure 15 - Measuring Cable to Length 11.1.5 Hold the sleeve and thimble together so that the cable does not slip. Lay the wire rope sleeve into the proper notch of the swaging tool for the size of sleeve you are using. Note: TrickAir uses only “O” oval type sleeves on their cables. The sleeve should be centered in the jaws of the swaging tool for the first swage. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 17 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 11.1.6 After the first swage has been made move on to the front of the cable for the second and to the rear for the third (Figure 16). Figure 16 - Swaging Order 11.1.7 Measure cable to verify length. Measure the crimped wire rope sleeve for proper compression using a Go-No Go Sleeve Gauge. Cut off excess cable from the salvage end. ¾” of cable should extend from the finished crimped wire rope sleeve to allow for full strength of the assembly (Figure 17). 11.1.8 Tape the loose end of the cable with chafe tape (Figure 18). Slide the heat shrink tube up over the taped area until it is in contact with the wire rope sleeve. Heat the tubing to shrink it in place (Figure 19). 11.1.9 Repeat steps 11.1.1 through 11.1.8 on the other cables. Figure 17 – Finished Cable End Figure 18 - Chafe Tape Installation Figure 19 - Finished Cable End 11.2 Install the finished cables on the aircraft. Adjust turnbuckles as necessary to obtain the same angle on both skis. Safety wire turnbuckles after adjustments are complete. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 18 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 12.0 Aircraft Weight and Balance, Skis Installed 12.1 Re-weigh airplane with the skis attached. Calculate new weight and balance according to aircraft manufacturer’s maintenance manual. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 19 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 13.0 Post Installation Paperwork 13.1 This installation must be accomplished by a properly rated Aircraft Technician. 13.2 Complete FAA Form 337 and a maintenance record entry for this alteration. 13.3 Maintenance must be performed in accordance with the Instructions for Continued Airworthiness. 13.4 After the initial installation, the pilot is required to make a log book entry when the skis are installed or removed. 13.5 Install applicable placards on the instrument panel in accordance with the Airplane Flight Manual Supplement. Silveraire, LLC. 18099 Elmcrest Avenue North Forest Lake, MN 55025 Document No.: IP-014 Revision: A Page: 20 Model 3000 Ski Installation Procedure: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F This document contains confidential and proprietary information and shall not be used, cited, or reproduced without written permission from Silveraire, LLC. 14.0 Post Installation Information 14.1 It is recommended that the aircraft operator read and become familiar with FAA Handbook H-8083-23. 14.2 Taxi 14.2.1 Taxi on pavement or other hard surfaces as normal. Taxi just as you would without the skis attached with the exception of extremely tight turns. Extremely tight turns will cause the tail wheels to scuff and wear prematurely. 14.2.2 Taxi on snow requires slightly more power depending on the snow condition. Turning radius will be greater but you still have the aid of your brakes to assist you in turns and stopping. 14.2.3 If your airplane has been sitting still on snow be sure your skis are not frozen in. Usually stepping on them and or giving them a gentle kick will free them in the event they are frozen. Some pilots will carry wooden blocks to place under the skis to prevent them from freezing in place. 14.3 Take off Procedures 14.3.1 Take off from hard surfaces may be accomplished as you would without skis. 14.3.2 Take off performance from snow will depend on the snow conditions. Refer to the Airplane Flight Manual Supplement for airplane performance information. 14.4 Landing 14.4.1 Landing on a hard surface may be accomplished just as you would without skis. 14.4.2 Landing performance on snow will depend on the condition of the snow. Refer to the Airplane Flight Manual Supplement for airplane performance information. 14.5 Extended Parking 14.5.1 It is a good idea to disconnect the shock cords when not in use. Rubber tends to lose its elasticity in cold weather. It also is easier to move the airplane around by hand if the shock cords are not attached.