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TROUBLE-SHOOTING 1. General Use the data below to trouble-shoot the main landing gear. WARNING: YOU MUST DO A HARD LANDING CHECK AFTER A HARD LANDING. HARD LANDINGS CAN CAUSE DAMAGE TO THE STRUCTURE AS WELL AS THE LANDING GEAR. Complaint Possible Cause Remedy Strut bent. Hard landing. Do a hard landing check. Refer to Chapter 05-50. Replace the strut. Negative camber. Strut bent, Hard landing. Do a hard landing check. Refer to Chapter 05-50. Replace the strut. Too much tire wear. Incorrect toe-in. Adjust the toe-in. Refer to Test Adjust The Main Landing Gear procedure. Landing Gear DA20-C1 AMM Page 102 19 Dec 1997 32-10-00 Doc # DA201-C1 Rev. 0 Intentionally left blank DA20-C1 AMM Landing Gear Doc # DA201-C1 Rev. 14 32-10-00 Page 201 30 Oct 2008 MAINTENANCE PRACTICES 1. General These maintenance practices tell you how to remove and install components of the main landing gear and adjust the main landing gear. Refer to the manufacturer for further data. 2. Remove/Install the Main Landing Gear Strut A. Equipment Item Quantity Reference Airplane jacks 2 Commercial Tail former 1 ? B. Remove the Main Landing Gear Strut (Refer to Figure 1 - Sheet 1) Detail Steps/Work Items Key Items (1) Lift the airplane on jacks. Refer to Chapter 07-10 (2) Remove the wheel fairing: − Remove the outer bolt. − Remove 2 screws on the inner side. If installed (3) Remove the back-plate from the brake caliper. Refer to Chapter 32-40 (4) Remove the wheel. Refer to Chapter 32-40 (5) Release the brake caliper. (6) Release the brake pipe from the strut. Tie the brake caliper back. Do not stress the brake pipe. (7) Remove the 4 bolts which attach the axle. Remove the axle, torque-plate and fairing mount. Only if you will install a different strut. (8) Disconnect the bonding cable from the strut. (9) Remove the nut, washers and bolt at the inner mount attachment-bracket. (10) Remove the nuts and washers, retaining bar, inserts and brass strips at the outer mount attachment-bracket. Hold the strut! (11) Remove the strut. Move the strut outboard. Landing Gear DA20-C1 AMM Page 202 30 Oct 2008 32-10-00 Doc # DA201-C1 Rev. 14 C. Install the Main Landing Gear Strut (Refer to Figure 1 - Sheet 1) Detail Steps/Work Items Key Items (1) Examine the spar bridge in the area of the main gear mountings. Look specially for damage to the GFRP structure Refer to Chapter 51-10 for GFRP inspection procedures. (2) Put the new strut in position. Move it inboard through the fuselage slot. (3) Put the inserts and brass strips in position above and below the strut at the outer mount. Hold the strut! Choose inserts to give 0.5mm (0.02 in) compression when tight. (4) Apply grease to the brass strips and the bolts. Use MIL-G-3545 grease. (5) Install the retaining bar. Install the washers and nuts to hold the retaining bar to the outer mount attachment-bracket Torque to 20 Nm (14.8 ft.lb.) (6) Apply grease to the washers and the bolt. Use MIL-G-3545 grease. (7) Install the bolt, washers and nut at the inner mount attachment-bracket. Refer to Figure 1 - Sheet 1. Make sure that 1 plain washer and the belleville spring washers are between the top of the strut and the mounting block. If necessary, install up to 2 plain washers between the spring washers and the mounting block to make the airplane level. (8) Tighten the nut on the inner bolt. To give a height of the spring washers of 4 +0.5mm -0 (0.16 +0.02 -0 in). (9) Connect the bonding cable to the strut. If you install a bonding terminal on a new strut, remove the surface protection where the terminal will attach. Then varnish the area with NYCOTE 7-11. (10) Install the axle, torque-plate and fairing mount. Install the 4 bolts which attach the axle. Only if you install a different strut. Torque 13.6 - 15.8 Nm (120 - 140 in.lb.). (11) Attach the brake pipe to the strut. (12) Install the brake caliper. Refer to Chapter 32-40 (13) Install the wheel. Refer to Chapter 32-40 (14) Install the back-plate to the brake caliper. Refer to Chapter 32-40 (15) Install the wheel fairing: − Install the outer bolt. − Install 2 screws on the inner side. Airplanes with wheel fairing option only. (16) Lower the airplane with the jacks. (17) Do a test for correct adjustment of the landing gear. See paragraph 3 DA20-C1 AMM www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：钻石20系列AMM 2
