MODEL SR0 AUXILIARY STRUCTURE. DESCRIPTION This section describes those structural components which make up the auxiliary structure including fuselage floor structure, floor access panels, entry step, and support handle. A. Fuselage Floor Structure The floor structure of the airplane consists of a forward floor and an aft floor. Both are foam core composite laminate panels designed to support flight and user loads. The front floor supports forward and aft console structures, rudder pedals, and a pulley gang assembly. The aft floor supports aft wing attachment loads, aft passenger seat loads, and cargo loads. The front floor is bonded to the sides of the fuselage and is supported by two longerons, firewall, and spar box. The aft floor is bonded to the sides of the fuselage and is supported by two longerons, the spar box, bulkhead 86, and bulkhead. B. Entry Step and Support Handle The entry step is constructed 0.049 inch gage streamline steel tubing. The entry step has 0.09 inch gage flanges that are welded to the tubing and secured to the fuselage belly and the aft floor. The support handle is constructed of 0.8 inch solid aluminum and secured to the top of the fuselage by screws. C. Aft Tie Down and Bracket The aft tie down is used to secure the airplane for parking, mooring, and maintenance operations that require the airplane to remain in a fixed position. It is located on the underside of the empennage directly below the horizontal stabilizer. (Refer to 0-0) Serials 005 thru 54 before SB X-5-0: The aft tie down consists of an eyebolt used to attach the aft empennage to a weighted tail stand or mooring ring. Serials 54 & subs, Serials 005 thru 54 after SB X-5-0: The aft tie down consists of a contoured rubber bumper with a hole used to attach the aft empennage to a weighted tail stand or mooring ring. The aft tie down bracket secures the aft tie down to the underside of the empennage. It is constructed of solid aluminum and secured to the aft spar of the vertical stabilizer by screws. 5-0 Page 5 Jun 00
MODEL SR0. MAINTENANCE PRACTICES A. Fuselage Floor Access Panels (See Figure 5-0) () Removal - Fuselage Floor Access Panels (a) Serials 005 thru 67 after SBX-95-0: If removing access panel CB6, disconnect battery from both positive and negative terminals. (Refer to 4-0) (b) Remove carpeting covering access panel. (Refer to 5-0) (c) Remove seat covering access panel, if necessary. (Refer to 5-0) (d) Remove fasteners securing access panel to fuselage floor. (e) Remove access panel. () Installation - Fuselage Floor Access Panels (a) Position access panel to floor access hole. (b) Install fasteners securing access panel to fuselage floor. (c) Install seat, if necessary. (Refer to 5-0) (d) Install carpeting. (Refer to 5-0) (e) Serials 005 thru 67 after SBX-95-0: If installing access panel CB6, connect battery to both positive and negative terminals. (Refer to 4-0) 5-0 Page 0 Jan 06
MODEL SR0 4 NOTE Serials 005 thru 67 after SBX-95-0 : If removing access panel CB6, disconnect battery from both terminals. LEGEND. Access Panel. Screw. Hook and Loop Fastener 4. Grommet Serials 005 thru 4 Serials 005 thru 4. Figure 5-0 Access Panels, Cabin - Serials 005 thru 4 (Sheet of ) SR0_MM5_74B 5-0 Page 0 Jan 06
MODEL SR0 4 5 Serials 4 thru 6, 64 thru 68. LEGEND. Access Panel. Screw. Fastener 4. Grommet 5. Hook & Loop SR0_MM5_8B 5-0 Page 4 5 Jun 00 Figure 5-0 Access Panels, Cabin - Serials 4 thru 68 (Sheet of ) Serials 4 thru 68
MODEL SR0 AFT CABIN FLOOR Serials w/ Air Conditioning. 5 5 5 4 5 Serials 69 and subs AFT CABIN FLOOR Serials 6, 69 & subs. Serials 6, 69 thru 064. Figure 5-0 Access Panels, Cabin - Serials 69 and subs (Sheet of ) LEGEND. Access Panel. Screw. Hook & Loop 4. Grommet 5. Fastener SR0_MM5_78C 5-0 Page 5 May 0
MODEL SR0 B. Entry Step (See Figure 5-0) () Removal - Entry Step (a) Remove access panel CF5. (Refer to 06-00) (b) Serials 0 & subs: Disconnect connector from step assembly LED assembly. (Refer to -40) (c) Serials 005 thru 0: Remove nuts, washers, and bolts securing entry step to baggage compartment floor. (d) Serials 0 & subs: Remove washers and bolts securing entry step to baggage compartment floor. (e) Remove nuts, washers, and screws securing step to fuselage belly. (f) Remove entry step from airplane. () Installation - Entry Step (a) Position entry step to baggage compartment floor and fuselage belly. (b) Install screws, washers, and nuts securing step to fuselage belly. (c) Serials 005 thru 0: Install bolts, washers, and nuts securing entry step to baggage compartment floor. (d) Serials 0 & subs: Install bolts and washers securing entry step to baggage compartment floor. (e) Serials 0 & subs: Connect connector to step assembly LED assembly. (Refer to -40) (f) Install access panel CF5. (Refer to 06-00) 5-0 Page 6 0 Jan 06
MODEL SR0 C. Support Handle (See Figure 5-0) () Removal - Support Handle (a) Remove cabin headliner. (Refer to 5-0) (b) Remove screws and washers securing support handle to fuselage. Remove support handle from airplane. () Installation - Support Handle (a) Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Loctite 4 Blue Loctite Corp Newington, CT Sealant. (b) Apply Loctite to support handle studs. (c) Position support handle to fuselage and secure with screws and washers. (d) Install cabin headliner. (Refer to 5-0) 5-0 Page 7 5 Jun 00
MODEL SR0 5 R 6 FLOOR FUSELAGE LEGEND. Bolt. Nut. Washer 4. Entry Step 5. Entry Handle 6. Screw 6 SR0_MM5_744B 5-0 Page 8 0 Jan 06 Figure 5-0 Entry Step and Support Handle Installation
MODEL SR0 D. Aft Tie Down (See Figure 5-0) () Removal - Aft Tie Down (a) Serials 005 thru 54 before SB X-5-0: At aft bottom of fuselage, remove eyebolt and jam nut secured to aft tie down bracket. (b) Serials 54 & subs, Serials 005 thru 54 after SB X-5-0: Remove aft tie down bumper. Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Blunt-Edged Non-Metallic Chisel - Any Source Removal Plastic Wedge 5 inches ( cm) Any Source Removal Plastic Scraper - Any Source Removal Cotton Cloth (clean, lint free) - Any Source Cleaning Isopropyl Alcohol 99% or higher purity Any Source Cleaning At aft bottom of fuselage, remove bolt securing aft tie down bumper to aft tie down bracket. Use chisel to carefully cut seam between aft tie down bumper and empennage. 4 Position cutting end of wedge at seam. 5 Strike back of wedge until aft tie down bumper is loosened from the empennage. 6 Use plastic scraper to remove adhesive residue. 7 Solvent clean faying surface on empennage. (Refer to 0-0) () Installation - Aft Tie Down (a) Serials 005 thru 54 before SB X-5-0: At aft bottom of fuselage, install eyebolt and jam nut to aft tie down bracket. (b) Serials 54 & subs, Serials 005 thru 54 after SB X-5-0: Install aft tie down bumper. Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Masking Tape.0 inches (7.6 cm) - Any Source Masking/ Sealing Aluminum Oxide Paper 60 to 80 grade Any Source Abrasion Cotton Cloth (clean, lint free) - Any Source Cleaning Isopropyl Alcohol 99% or higher purity Any Source Cleaning 5-0 Page 9 5 Dec 04
MODEL SR0 Description P/N or Spec. Supplier Purpose Adhesion Promoter 94 M Company St. Paul, MN 5544 888-64-577 Bonding Adhesion Promoter (alternate) AC-45 AC TECH Garden Grove, CA 984 74-7-87 Sealant, Epoxy Cured Polythioether PR-89 CLASS B, / PRC-DeSoto International Glendale, CA 909 88-40-060 Adhesive Sealant, Polysulfide (alternate) Tie-Down Strap (ratcheted, vinyl coated hooks) MIL-S-880F or AMS-S-880 Type II, Class B Any Source - Any Source Fixture Remove LH and RH empennage access panels. (Refer to 5-0) To determine fuselage faying surface, position tie down bumper to fuselage at aft tie down bracket and align along BL 0.00 ±. Apply masking tape to fuselage skin surrounding tie down bumper. Remove tie down bumper. CAUTION: Do not abrade outside of fuselage faying surface. 4 At fuselage faying surface, remove surface protection by abrasion. (Refer to 5-0) 5 Abrade faying surface of tie down bumper. (Refer to 5-0) 6 Solvent clean both faying surfaces. (Refer to 0-0) 7 Apply adhesion promoter to both faying surfaces. Wipe off excess adhesion promoter and allow to dry for 0 minutes prior to bonding. 8 Follow manufacturer s instructions for mixing sealant. 9 Apply sealant to faying surface of tie down bumper with a bondline thickness 0.005 to 0.080 inch (0.0 to.00 mm). 0 Position tie down bumper to fuselage at aft tie down bracket and align along BL 0.00 ±. CAUTION: Do not over-ratchet tie-down strap. Excessive tension may damage fuselage structure where tie-down strap hooks are attached. To prevent chafing, ensure tie-down strap hooks are vinyl coated or protect hook contact point at access panel hole edges with padding material. Secure tie down bumper to fuselage using a racheted tie-down strap with hooks secured to access panel holes. CAUTION: Do not over-torque tie down bumper installation bolt. Excessive torque may misalign tie down bumper such that front of tie down bumper could pull away from the fuselage. 5-0 Page 0 5 Jun 00
MODEL SR0 Install bolt to secure tie down bumper to aft tie down bracket. Torque bolt to 5.0-0.0 in-lb (.7 -. Nm). Carefully wipe off any excess adhesive from edges of tie down bumper. 4 After cure cycle is completed, remove tie-down strap. 5 Install LH and RH empennage access panels. (Refer to 5-0) 5-0 Page 5 Dec 04
MODEL SR0 E. Aft Tie Down Bracket (See Figure 5-0) () Removal - Aft Tie Down Bracket (a) Serials 54 & subs, Serials 005 thru 54 after SB X-5-0: Remove aft tie down. (Refer to 5-0) (b) Remove rudder. (Refer to 55-40) (c) Remove lower vertical bottom hinge. (Refer to 55-50) (d) Remove bolts and washers securing aft tie down bracket to aft spar of vertical stabilizer. Remove aft tie down bracket. () Installation - Aft Tie Down Bracket (a) Position and install bolts and washers securing aft tie down bracket to aft spar of vertical stabilizer. (b) Install lower vertical bottom hinge. (Refer to 55-50) (c) Install rudder. (Refer to 55-40) (d) Serials 54 & subs, Serials 005 thru 54 after SB X-5-0: Install aft tie down. (Refer to 5-0) 5-0 Page 5 Jun 00
MODEL SR0 HINGE, LOWER VERTICAL BOTTOM 5 6 4 HINGE, LOWER VERTICAL BOTTOM Serials 005 thru 54 before SB X-5-0. 4 6 4.5 inches (.75 mm) MASKING TAPE EMPENNAGE ACCESS PANEL HOLE A 6.7 inches (6.80 mm) Serials 54 & subs, 005 thru 54 after SB X-5-0. NOTE Abrade faying surfaces of tie down bumper and fuselage. Do not abrade outside of fuselage faying surface. Apply sealant to faying surface of tie down bumper with a bondling thickness 0.005 to 0.080 inch (0.0 to.00 mm). Do not over-ratchet tie down strap. Excessive tension may damage fuselage structure where tie down strap hooks are attached. To prevent chafing, ensure tie down strap hooks are vinyl coated or protect hook contact point at access panel hole edges with padding material. Torque bolt to 5.0-0.0 in-lb (.7 -. Nm). Do not over-torque tie down bumper installation bolt. Excessive torque may misalign tie down bumper such that front of tie down bumper could pull away from the fuselage. A FUSELAGE FAYING SURFACE EMPENNAGE LEGEND. Bumper. Eyebolt. Aft Tie Down Bracket 4. Bolt 5. Nut 6. Washer SR0_MM5_8A Figure 5-0 Aft Tie Down Installation 5-0 Page 5 Dec 04
MODEL SR0 Intentionally Left Blank 5-0 Page 4 5 Jun 00