AIR INTAKES 1. DESCRIPTION This section describes that portion of the power plant which directs mass air flow to the engine. Induction air enters the engine through a filter mounted on the left, forward side of the engine then flows into the induction duct assembly mounted center, forward on the engine. The induction duct assembly employs a flapper valve which, in the case of filter blockage, or induction ice, allows alternate air to enter the induction duct body via a flexible duct open to the RH cylinder area beneath the baffling of the engine. The alternate air valve is manually controlled from the cabin by pulling a control knob mounted on the left side of the center console. From the induction duct body, induction air flows to the throttle body after which the air is distributed to each cylinder via the intake manifold and separate intake tubes. 1-0 Page 1 1 Apr 200
2. MAINTENANCE PRACTICES A. Induction Air Filter (See Figure 1-01) (1) Removal - Induction Air Filter (a) Remove screw and washer securing support to engine. (b) Remove cotter pin, nut, washer, and cover plate securing filter to induction duct assembly. (c) Remove filter from airplane. (2) Installation - Induction Air Filter Note: Additional washers may be added to properly align cotter pin. (a) (b) Position filter to induction duct assembly and secure with cover plate, washer, nut, and cotter pin. Install screw and washer securing support to engine. 1-0 Page 2 1 Apr 200
B. Alternate Air Control Cable (See Figure 1-01) (1) Removal - Alternate Air Control Cable (a) Remove engine cowling. (Refer to 1-10) (b) Remove cotter pin, nut, washers, and bolt securing cable to flapper valve control arm. (c) Remove nut, washers, bolt, and clamp securing cable to induction duct assembly. (d) Remove nut, washer, bolt, and clamp securing cable to #3 cylinder manifold. (e) Remove nut and washer securing alternate air control knob and cable to console mounting bracket. Note: Prior to removal, note routing of cable through firewall and console ribs for aid on reinstallation and remove as much sealant as possible surrounding cable fitting on firewall. (f) Gently pull cable aft, through firewall, ensuring that the cable does not inadvertently pull other components loose, and remove from airplane. (2) Installation - Alternate Air Control Cable (a) Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose High Temperature Silicone Adhesive RTV 3 Dow Corning Sealant. Fiber Frax 0J,TON- 01 UniFrax Firewall insulation. (b) Ensure cable fitting on firewall is clear and free of old sealant. (c) Route cable through mounting bracket, firewall, and engine baffling, to flapper valve control arm. (d) Install washer and nut securing alternate air control knob to console mounting bracket. (e) Install bolt, washers, nut, and cotter pin securing control cable to flapper valve control arm. (f) Wrap FiberFrax paper around portion of control cable which will pass through firewall fitting so a tight fit is achieved at the cable/firewall interface. (g) Remove alternate air hose connected to induction duct to gain visibility to flapper valve. (h) Install support clamp, bolt, and nut securing control cable to engine baffling so that with the cable control knob pushed in, the flapper valve fully closes. (i) Install clamp, bolt, washers, and nut securing cable to induction duct assembly. (j) Install clamp, bolt, washer, and nut securing cable to #3 cylinder manifold. (k) Apply silicone adhesive to entire firewall fitting and fitting/cable interface. (l) Install engine cowling. (Refer to 1-10) 1-0 Page 3 1 Apr 200
C. Induction Duct (See Figure 1-01) (1) Removal - Induction Duct Assembly (a) Remove induction air filter. (Refer to 1-0) (b) Remove cotter pin, nut, washers, and bolt securing induction air cable to flapper valve control arm. (c) Remove clamp securing alternate air duct to induction duct assembly. (d) Serials 0002 thru 0 before SB 2X-1-0: Remove bolt, washer, engine lifting eye, nut, and cotter pin securing induction duct assembly to engine. (e) Serials 0002 thru 0 after SB 2X-1-0, 08 thru 03 before SB 2X-1-12: Remove bolt, washers, clamp, and nut securing induction duct assembly to bracket. (f) Serials 0 thru 1818 before SB 2X-1-12: Remove bolt, washers, nut, cotter pin, and support bracket securing induction duct assembly to bracket. (g) Loosen clamps securing induction duct assembly to throttle body. Remove induction duct assembly from airplane. (2) Disassembly - Induction Duct Assembly (a) Serials 08 thru 1818 before SB 2X-1-12: Remove bolt, washers, nut, cotter pin, and support bracket securing flapper assembly to induction duct assembly. (b) Serials 08 thru 1818 after SB 2X-1-12, 181 & subs: Remove bolt, washers, nut, and cotter pin securing flapper assembly to induction duct assembly. (3) Assembly- Induction Duct Assembly (a) Serials 08 thru 1818 before SB 2X-1-12: Install bolt, washers, nut, cotter pin, and support bracket securing flapper assembly to induction duct assembly. (b) Serials 08 thru 1818 after SB 2X-1-12, 181 & subs: Install bolt, washers, nut, and cotter pin securing flapper assembly to induction duct assembly. () Installation - Induction Duct Assembly (a) Serials 0002 thru 0 before SB 2X-1-0: Install forward bolt, washers, engine lifting eye, and nut securing induction duct assembly to engine block. Torque bolt to 180-220 inch pounds (20.3-2. Nm). (b) Serials 0002 thru 0 after SB 2X-1-0, 08 thru 03: Install bolt, washers, clamp, and nut securing induction duct assembly to support bracket. (c) Serials 08 thru 1818 before SB 2X-1-12: Install bolt, washers, nut, cotter pin, and support bracket securing flapper assembly to induction duct assembly. (d) Serials 08 thru 1818 after SB 2X-1-12, 181 & subs: Install bolt, washers, nut, and cotter pin securing flapper assembly to induction duct assembly. (e) Position induction duct assembly to throttle body. Tighten clamps securing induction duct assembly to throttle body. (f) Install clamp securing alternate air duct to induction duct assembly. (g) Position induction air cable to flapper valve control arm and secure with bolt, washers, nut and cotter pin. (h) Install induction air filter. (Refer to 1-0) 1-0 Page 1 Apr 200
D. Induction Duct Bracket (See Figure 1-01) (1) Removal - Induction Duct Bracket (a) Serials 0002 thru 0 after SB 2X-1-0, 08 thru 03: Remove aft bolt, washers, and nut securing support bracket to engine block along the engine centerline. (b) Remove forward bolt, washers, and nut securing support bracket and engine lifting eye to engine block along the engine centerline. (2) Installation - Induction Duct Bracket Note: Ensure engine lifting eye is outboard of support bracket and positioned for the forward bolt during reassembly. (a) (b) (c) Position washers, support bracket, and engine lifting eye to forward engine block installation hole. Install forward bolt, washers, and nut securing support bracket and engine lifting eye to engine block. Torque bolt to 180-220 inch pounds (20.3-2. Nm). Serials 0002 thru 0 after SB 2X-1-0, 08 thru 03: Install aft bolt, washers, and nut securing support bracket to engine block. Torque bolt to 180-220 inch pounds (20.3-2. Nm). 1-0 Page 1 Apr 200
CIRRUS AIRPLANE MAINTENANCE MANUAL 1 1 Serials 0002 thru 08. Serials 0002 thru 0 before SB 2X-1-0. Serials 08 thru 08. Serials 0002 thru 0 after SB 2X-1-0. 8 3 CENTER CONSOLE BRACKET (REF) 3 Serials 0002 thru 08. 2 1 1 10 NOTE Additional washers may be added to properly align cotter pin. 12 1 11 1 Serials 0002 thru 0. 1 10 1 Serials 0002 thru 03. LEGEND 1. Jam Nut 2. Star Washer 3. Induction Air Cable. Bolt. Washer. Clamp. Nut 8. Attach Lever. Cotter Pin 10. Flexible Ducting 11. Filter Cover 12. Filter 13. Threaded Rod 1. Induction Duct 1. Support 1. Screw 1. Lifting Ring SR22_MM1_11B Serials 08 thru 08. Figure 1-01 Induction System Installation - Serials 0002 thru 03 (Sheet 1 of 2) 1-0 Page 1 Apr 200 Serials 0002 thru 03
CIRRUS AIRPLANE MAINTENANCE MANUAL NOTE Additional washers may be added to properly align cotter pin. 1 1 Induction assembly rotated 30 for clarity. PART OF ENGINE (REF) Rotate lifting ring as required for lever clearance. 1 1 18 1 1 1 PART OF ENGINE (REF) Serials 08 thru 1818 before SB 2X-1-12. 1 1 1 1 3 13 1 12 11 10 1 1 1 LEGEND 3. Induction Air Cable. Bolt. Washer. Clamp. Nut. Cotter Pin 10. Flexible Ducting 11. Filter Cover 12. Filter 13. Threaded Rod 1. Induction Duct 1. Support 1. Screw 1. Lifting Ring 18. Clevis Pin 1. Bushing SR22_MM1_1B Figure 1-01 Induction System Installation - Serials 0 & subs (Sheet 2 of 2) Serials 0 & subs 1-0 Page 1 Apr 200
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