C I R R U S COWLING DESCRIPTION

Transcription

1 COWLING 1. DESCRIPTION Serials thru , thru : The engine cowling, fabricated from fiberglass and epoxy, consists of one upper and two lower halves. A one-piece ( thru ) or two-piece & subs) urethane closeout seal is secured to the lower cowl halves to fully surround the nose gear strut. The cowling is secured to the fuselage with quarter-turn fasteners and screws. The oil inspection door is located on the upper cowl and the external power receptacle door is located on the lower cowl. The landing light assembly is integral to the LH lower cowl. For maintenance practices pertinent to the landing light, refer to Chapter, Lights. (Refer to -0) Serials thru : The engine cowling, fabricated from fiberglass and epoxy, consists of one upper and one lower half. An aluminum closeout plate and two urethane closeout seals are secured to the lower cowl to fully surround the nose gear strut. The cowling is secured to the fuselage with quarter-turn fasteners and screws. The oil inspection door is located on the upper cowl and the external power receptacle door is located on the lower cowl. The landing light assembly is integral to the lower cowl. For maintenance practices pertinent to the landing light, refer to Chapter, Lights. (Refer to -0) Serials & subs: The engine cowling, fabricated from fiberglass and epoxy, consists of one upper and two lower halves. The cowling is secured to the fuselage with quarter-turn fasteners and screws. The oil inspection door is located on the upper cowl and the external power receptacle door is located on the lower cowl. A fresh air inlet in the lower RH cowl provides fresh air for the environmental system. The landing light assembly is integral to the LH lower cowl. For maintenance practices pertinent to the landing light, refer to Chapter, Lights. (Refer to -0) Serials 22T-0001 & subs: The engine cowling, fabricated from fiberglass and epoxy, consists of one upper and two lower halves. A two-piece aluminum closeout panel with rubber seals is secured to the lower cowl halves and fuselage to fully surround the nose gear strut. The cowling is secured to the fuselage with quarter-turn fasteners and screws. The oil inspection door is located on the upper cowl and the external power receptacle door is located on the lower cowl. A fresh air inlet in the lower RH cowl provides fresh air for the environmental system. Two additional induction air inlets, located on the RH and LH lower cowls, provide fresh air to each turbocharger. The landing light assembly is integral to the LH lower cowl. For maintenance practices pertinent to the landing light, refer to Chapter, Lights. (Refer to -0) All Page 1

2 2. MAINTENANCE PRACTICES A. Engine Cowling - Serials thru (See Figure 1) CAUTION: Two people are required when removing or installing engine cowling to avoid damaging the cowling due to bending or flexing. Apply masking tape around perimeter of spinner to avoid scratching spinner. (1) Removal - Engine Cowling (a) Remove screws securing upper cowl to lower cowls. (b) Release quarter-turn fasteners securing upper cowl to lower cowls and fuselage. Remove upper cowl from airplane. (c) Disconnect landing light connector on LH lower cowl. (d) Remove screws securing closeout seal to bottom of lower cowls. Remove closeout seal from airplane. WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (e) Rotate propeller so one blade is vertical. (f) Remove screws securing RH lower cowl to LH lower cowl and outlet radius. (g) Release quarter-turn fasteners securing RH lower cowl to LH lower cowl and fuselage. Remove RH lower cowl from airplane. (h) Release quarter-turn fasteners securing LH lower cowl to fuselage. Remove LH lower cowl from airplane. (2) Installation - Engine Cowling WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (a) (b) (c) (d) (e) Rotate propeller so one blade is vertical. Position LH lower cowl around engine compartment and secure to fuselage with quarterturn Position RH lower cowl around engine compartment and secure to LH lower cowl and fuselage with quarter-turn Install screws securing RH lower cowl to LH lower cowl and outlet radius. Connect landing light connector on LH lower cowl. Note: To facilitate cowling installation, place thumb on cowl directly above quarterturn fastener, lightly apply thumb pressure to reduce space between fastener and receptacle, turn and seat fastener. (f) Place upper cowl into position and secure to lower cowls and fuselage with quarter-turn (g) Install screws securing upper cowl to lower cowls. (h) Position closeout plate around nose gear strut and secure with screws. (i) Perform Inspection/Check - Engine Cowl Fit-Up. (Refer to ) (j) Open engine oil access door and inspect engine baffle seal. Seal must be bent inward ensuring a seal along the radius of the upper cowl. (k) Close engine oil access door. (l) Remove protective tape from spinner. Page 2 1 Jun 2010 Serials thru

3 B. Engine Cowling - Serials thru (See Figure 1) CAUTION: Two people are required when removing or installing engine cowling to avoid damaging the cowling due to bending or flexing. Apply masking tape around perimeter of spinner to avoid scratching spinner. (1) Removal - Engine Cowling (a) Remove screws securing closeout plate to bottom of lower cowl. Remove plate from airplane. WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (b) Rotate propeller so one blade is vertical. (c) Remove screws securing upper cowl to lower cowl. (d) Release quarter-turn fasteners securing upper cowl to lower cowl and fuselage. Remove upper cowl from airplane. (e) Disconnect landing light connector on lower cowl. (f) Release quarter-turn fasteners securing lower cowl to fuselage. Remove lower cowl from airplane. (2) Installation - Engine Cowling WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (a) (b) (c) Rotate propeller so one blade is vertical. Position lower cowl around engine compartment and install quarter-turn Connect landing light connector on lower cowl. Note: To facilitate cowling installation, place thumb on cowl directly above quarterturn fastener, lightly apply thumb pressure to reduce space between fastener and receptacle, turn and seat fastener. (d) Place upper cowl into position and secure to lower cowl and fuselage with quarter-turn (e) Install screws securing upper cowl to lower cowl. (f) Position closeout plate around nose gear strut and secure with screws. (g) Perform Inspection/Check - Engine Cowl Fit-Up. (Refer to ) (h) Open engine oil access door and inspect engine baffle seal. Seal must be bent inward ensuring a seal along the radius of the upper cowl. (i) Close engine oil access door. (j) Remove protective tape from spinner. Serials thru Page 1 Jun 2010

4 C. Engine Cowling - Serials thru (See Figure 1) CAUTION: Two people are required when removing or installing engine cowling to avoid damaging the cowling due to bending or flexing. Apply masking tape around perimeter of spinner to avoid scratching spinner. (1) Removal - Engine Cowling (a) Remove screws securing upper cowl to lower cowls. (b) Release quarter-turn fasteners securing upper cowl to lower cowls and fuselage. Remove upper cowl from airplane. (c) Disconnect landing light connector on LH lower cowl. (d) Serials thru : Disconnect fresh air inlet duct from RH lower cowl. WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (e) Rotate propeller so one blade is vertical. (f) Remove screws securing RH lower cowl to LH lower cowl. (g) Release quarter-turn fasteners securing RH lower cowl to fuselage. Remove RH lower cowl from airplane. (h) Remove screws securing LH lower cowl to drain manifold. (i) Release quarter-turn fasteners securing LH lower cowl to fuselage. Remove LH lower cowl from airplane. (2) Installation - Engine Cowling WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (a) (b) (c) (d) (e) (f) (g) Rotate propeller so one blade is vertical. Position LH lower cowl around engine compartment and secure to fuselage with quarterturn Install screws securing LH lower cowl to drain manifold. Position RH lower cowl around engine compartment and secure to fuselage with quarterturn Install screws securing RH lower cowl to LH lower cowl. Serials thru : Connect fresh air inlet duct to RH lower cowl. Connect landing light connector on LH lower cowl. Note: To facilitate cowling installation, place thumb on cowl directly above quarterturn fastener, lightly apply thumb pressure to reduce space between fastener and receptacle, turn and seat fastener. (h) Place upper cowl into position and secure to lower cowls and fuselage with quarter-turn (i) Install screws securing upper cowl to lower cowls. (j) Perform Inspection/Check - Engine Cowl Fit-Up. (Refer to ) (k) Open engine oil access door and inspect engine baffle seal. Seal must be bent inward ensuring a seal along the radius of the upper cowl. (l) Close engine oil access door. (m) Remove protective tape from spinner. Page Serials thru

5 D. Engine Cowling - Serials & subs (See Figure 1) CAUTION: Two people are required when removing or installing engine cowling to avoid damaging the cowling due to bending or flexing. Apply masking tape around perimeter of spinner to avoid scratching spinner. (1) Removal - Engine Cowling (a) Remove screws securing upper cowl to lower cowls. (b) Release quarter-turn fasteners securing upper cowl to lower cowls and to fuselage. Remove upper cowl from airplane. (c) Disconnect landing light connector on LH lower cowl. (d) Disconnect environmental fresh air inlet duct from RH lower cowl. (e) Remove screws securing fuel drain manifold to LH lower cowl. WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (f) Rotate propeller so one blade is vertical. (g) Remove screws securing RH lower cowl to LH lower cowl. (h) Release quarter-turn fasteners securing RH lower cowl to fuselage. Remove RH lower cowl from airplane. (i) Release quarter-turn fasteners securing LH lower cowl to fuselage. Remove LH lower cowl from airplane. (2) Installation - Engine Cowling WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (a) (b) (c) (d) (e) (f) (g) Rotate propeller so one blade is vertical. Position LH lower cowl around engine compartment and secure to fuselage with quarterturn Position RH lower cowl around engine compartment and secure to fuselage with quarterturn Install screws securing RH lower cowl to LH lower cowl. Install screws securing fuel drain manifold to LH lower cowl. Connect environmental fresh air inlet duct to RH lower cowl. Connect landing light connector on LH lower cowl. Note: To facilitate cowling installation, place thumb on cowl directly above quarterturn fastener, lightly apply thumb pressure to reduce space between fastener and receptacle, turn and seat fastener. (h) Place upper cowl into position and secure to lower cowls and fuselage with quarter-turn (i) Install screws securing upper cowl to lower cowls. (j) Perform Inspection/Check - Engine Cowl Fit-Up. (Refer to ) (k) Open engine oil access door and inspect engine baffle seal. Seal must be bent inward ensuring a seal along the radius of the upper cowl. (l) Close engine oil access door. (m) Remove protective tape from spinner. Serials & subs Page

6 1 LEGEND 1. Upper Cowl 2. Seal. Quarter-Turn Stud. Grommet. Retaining Ring 6. Quarter-Turn Receptacle 7. Oil Filler Access Door 8. Lower Cowl, RH 9. Lower Cowl, LH 10. External Power Access Door 11. Closeout Seal 12. Outlet Radius 1. Screw Page Serials thru Figure 1 Engine Cowling Installation - Serials thru (Sheet 1 of ) 11 1 Serials thru SR22_MM71_12B

7 LEGEND 1. Upper Cowl 2. Seal. Quarter-Turn Stud. Grommet. Retaining Ring 6. Quarter-Turn Receptacle 7. Oil Filler Access Door 10. External Power Access Door 1. Screw 1. Lower Cowl 1. Closeout Seal, RH 16. Closeout Seal, LH 17. Closeout Plate Serials thru SR22_MM71_17B Serials thru Figure 1 Engine Cowling Installation - Serials thru (Sheet 2 of ) Page 7

8 Serials thru NOTE Serials 22-2, , thru DRAIN MANIFOLD (REF) 1 Serials thru LEGEND 1. Upper Cowl 2. Seal. Quarter-Turn Stud. Grommet. Retaining Ring 6. Quarter-Turn Receptacle 7. Oil Filler Access Door 8. Lower Cowl, RH 9. Lower Cowl, LH 10. External Power Access Door 1. Screw 1. Closeout Seal, RH 16. Closeout Seal, LH 18. Closeout Seal, Fwd 19. Closeout Seal, Aft SR22_MM71_1869D Page 8 Figure 1 Engine Cowling Installation - Serials thru (Sheet of ) Serials thru

9 FRESH AIR INLET DUCT (REF) DRAIN MANIFOLD (REF) 10 1 LEGEND 1. Upper Cowl 2. Seal. Quarter-Turn Stud. Grommet. Retaining Ring 6. Quarter-Turn Receptacle 7. Oil Filler Access Door 8. Lower Cowl, RH 9. Lower Cowl, LH 10. External Power Access Door 1. Screw Serials & subs. SR22_MM71_0 Serials & subs Figure 1 Engine Cowling Installation - Serials & subs (Sheet of ) Page 9

10 E. Engine Cowling - Serials 22T-0001 & subs (See Figure 1) CAUTION: Two people are required when removing or installing engine cowling to avoid damaging the cowling due to bending or flexing. Apply masking tape around perimeter of spinner to avoid scratching spinner. (1) Removal - Engine Cowling (a) Remove screws securing upper cowl to lower cowls. (b) Release quarter-turn fasteners securing upper cowl to lower cowls and to fuselage. Remove upper cowl from airplane. (c) Disconnect landing light connector on LH lower cowl. (d) Disconnect environmental fresh air inlet duct from RH lower cowl. (e) Disconnect turbocharger fresh air inlet ducts from RH and LH lower cowls. WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (f) Rotate propeller so one blade is vertical. (g) Remove screws securing RH lower cowl to LH lower cowl. (h) Remove screws and washers securing RH lower cowl to closeout panel. (i) Release quarter-turn fasteners securing RH lower cowl to fuselage. Remove RH lower cowl from airplane. (j) Remove screws securing LH lower cowl to closeout panel. (k) Release quarter-turn fasteners securing LH lower cowl to fuselage. Remove LH lower cowl from airplane. (2) Installation - Engine Cowling WARNING: Ensure engine magnetos are grounded (OFF) prior to rotating propeller. (a) (b) (c) (d) (e) (f) (g) (h) (i) Rotate propeller so one blade is vertical. Position LH lower cowl around engine compartment and secure to fuselage with quarterturn Install screws securing LH lower cowl to closeout panel. Position RH lower cowl around engine compartment and secure to fuselage with quarterturn Install screws securing RH lower cowl to closeout panel. Install screws securing RH lower cowl to LH lower cowl. Connect turbocharger fresh air inlet ducts to RH and LH lower cowls. Connect environmental fresh air inlet duct to RH lower cowl. Connect landing light connector on LH lower cowl. Note: To facilitate cowling installation, place thumb on cowl directly above quarterturn fastener, lightly apply thumb pressure to reduce space between fastener and receptacle, turn and seat fastener. Page 10 (j) Place upper cowl into position and secure to lower cowls and fuselage with quarter-turn (k) Install screws securing upper cowl to lower cowls. (l) Perform Inspection/Check - Engine Cowl Fit-Up. (Refer to ) (m) Open engine oil access door and inspect engine baffle seal. Seal must be bent inward ensuring a seal along the radius of the upper cowl. Serials 22T-0001 & subs

11 (n) (o) Close engine oil access door. Remove protective tape from spinner. Serials 22T-0001 & subs Page 11

12 DRAIN MANIFOLD (REF) LEGEND 1. Upper Cowl 2. Seal. Quarter-Turn Stud. Grommet. Retaining Ring 6. Quarter-Turn Receptacle 7. Oil Filler Access Door 8. Lower Cowl, RH 9. Lower Cowl, LH 10. External Power Access Door 11. Screw 12. Closeout Panel 1. Washer SR22_MM71_217 Page 12 Figure 2 Engine Cowling Installation - Serials 22T-0001 & subs Serials 22T-0001 & subs

13 F. Inspection/Check - Engine Cowl Fit-Up - Serials & subs (See Figure ) (1) Inspection/Check - Engine Cowl Fit-Up (a) Ensure gap between propeller spinner and cowling measures /-0.0 inch ( /-0.0 mm). (b) Serials thru : Measure height difference between aft, top of spinner and forward, top of cowl. 1 If cowl is level with, or no greater than 0.2 inch (0.6 cm) lower than spinner, the cowl is properly aligned. 2 If cowl is higher than 0.2 inch (0.6 cm) above top of spinner, perform Adjustment/ Test - Engine Mount Weldment. (Refer to 71-20) Serials & subs Page 1

14 COWLING (REF) 0.12 ±0.12 inch (.17 ±.17 mm) SPINNER (REF) inch (6. mm) ( ) SR22_MM71_17 Page 1 Figure Cowling Alignment Measurements - Serials & subs Serials & subs

15 G. Inspection/Check - Engine Cowl Fit-Up - Serials 22T-0001 & subs (See Figure ) (1) Inspection/Check - Engine Cowl Fit-Up (a) Align top of cowling with BL0 below spinner so that the height difference between aft, top of spinner and forward, top of cowl measures 0.20 inch (.08 mm). (b) Ensure the gap between propeller spinner and cowling measures 0.26 inch (6.60 mm). Serials 22T-0001 & subs Page 1

16 COWLING (REF) 0.20 inch (.08 mm) SPINNER (REF) 0.26 inch (6.60 mm) SR22_MM71_218 Page 16 Figure Cowling Alignment Measurements - Serials 22T-0001 & subs Serials 22T-0001 & subs

17 H. Repairs (1) Repair - Cowl Flange Contact (See Figure ) Contact of spinner to cowling may result in damage to cowl flanges due to cowling misalignment. The affected area lies at the forward cowl flanges and occurs when screws securing the upper and lower cowls together at forward inlets are not installed prior to starting the airplane. Any other damage extending beyond the cowl flanges is not field repairable and Cirrus Design must be contacted for disposition. (Refer to AMM-Intro-00) (a) Remove engine cowling. (Refer to ) (b) Determine type and extent of damage. If necessary, contact Cirrus Design for disposition. (Refer to AMM-Intro-00) (c) Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Precure Patch Material 7.0 x 1.0 inches (19.0 x 6.8 cm) Cirrus Design Repair composite Duluth, MN 811 structures Compass With Extension Bar 1.2 inches (6.07 cm) minimum diameter Any Source Measure and mark semi-ring repair patch. Isopropyl Alcohol 99% or higher purity Any Source General cleaning. Orbital Sander 982A12 Any Source Prepare repair surface. Masking Tape 2.0 inches (.0 cm) Any Source Limit repair area. Permanent Marker (Refer to 1-0) (Refer to 1-0) Identify repair area. Release Film (Refer to 1-0) (Refer to 1-0) Protect lay-up surface. Peel Ply (Refer to 1-0) (Refer to 1-0) Makes smooth and contaminate free repair surface. Glass Repair Fabric (Refer to 1-0) (Refer to 1-0) Repair composite structures. Plastic Sheet - Any Source Make template of repair ply. Structural Paste Adhesive Repair System: MGS L18- Based or ES6292- Based Structural Resin Repair System: MGS L18- Based or MGS L28- Based (Refer to 1-0) (Refer to 1-0) Bond plies over puncture. (Refer to 1-0) (Refer to 1-0) Ply lay-up. All Sandpaper 120-grit or finer Any Source Paint and primer removal. Page 17 1 Dec 201

18 Description P/N or Spec. Supplier Purpose Sandpaper 60 to 80-grit Any Source Abrade bonding surfaces. Rigid Closed Cell Foam (Refer to 1-0) (Refer to 1-0) Stiffen laminate. Aerosil (Refer to 1-0) (Refer to 1-0) Resin filler. Sil-Cell (Refer to 1-0) (Refer to 1-0) Resin filler. CAUTION: Note: Never use a grinder for removal of outer surface coats. A grinder will gouge the surface creating more damage. Chemical strippers should not be used as they may become trapped, damage the laminate, or leave a residue. Multi-action orbital type sanders or simple hand-sanding are the preferred methods of paint removal. Fine-grit paper (120-grit or finer) should be selected to minimize the potential for accidental damage. (d) Remove paint finish from repair area. (Refer to 1-20) (e) If affected by repair area, remove Expanded Metal Mesh (EMM) lightning protection and/or aluminum tape. (Refer to 1-20) Note: Sand cowl flange to tangent at least 0. inch (12.7 mm) beyond damaged area. Retain as much flange width as possible. (f) If necessary, use sandpaper to remove any delaminated, loose, or damaged plies on the cowl skin. (Refer to 1-20) (g) Solvent clean with isopropyl alcohol. (Refer to 20-0) (h) Prepare cowl repair patch. (See Figure ) 1 On precure patch material, use compass to measure and mark 7.10 inches (18.0 cm) radius for outer edge of semi-ring. From initial compass needle position, measure and mark 6.10 inches (1.9 cm) radius for inner edge of semi-ring. 2 Cut semi-ring shape from precure patch material to create repair patch. Serials thru , & subs, 22T-0001 & subs: For repairs to either lower cowl sections, position repair patch to cowl flange and cut away excess. CAUTION: To ensure proper adhesion, prepared surface on cowl must be larger than repair patch. (i) Bevel outer edge of repair patch to fill radius at cowl flange tangent. Bond repair patch into position. 1 Solvent clean with isopropyl alcohol. (Refer to 20-0) 2 Mix MGS L18-based or ES6292-based structural adhesive. (Refer to 1-0) Using a clean spatula or wooden applicator, apply adhesive to repair area on inside of cowl flange to obtain bond thickness of 0.00 to inch (0.1 to 1.0 mm). Page 18 1 Dec 201 CAUTION: Note: Movement during cure may cause bond voids. Do not move or pull repair patch away from cowl flange after squish-out is achieved or voids will form. If insufficient amount of cowl flange remains to fixture the repair patch, secure repair patch into position using tape. All

19 Align inner edge of repair patch with original cowl flange edge. Secure with fixturing as required to prevent movement during cure. Cure repair patch bond. (Refer to 1-20) 6 Taper original cowl flange at damaged edges to create smooth transition for repair plies. Note: Ensure plies extend at least 0. inch (12.7 mm) beyond disbond. Ensure each ply overlaps the previous ply by at least 0. inch (12.7 mm). (j) Cut five glass-fiber repair plies at ±. (Refer to 1-20) (k) Mix MGS L18-based or MGS L28-based structural resin. (Refer to 1-0) Note: It is acceptable to butt plies to cowling flange edge. (l) Layup three glass fabric repair plies to inner side of cowl flange. (Refer to 1-20) (m) Layup two glass fabric repair plies to outer side of cowl flange. (Refer to 1-20) (n) Cure repair plies. (Refer to 1-20) (o) Sand repair plies to edge of repair ring. (p) If affected by repair area, install Expanded Metal Mesh (EMM) lightning protection and/or aluminum tape. (Refer to 1-20) (q) Prepare the surface for primer and paint. (Refer to 1-20) (r) Paint repair area. (Refer to 1-20) (s) Install engine cowling. (Refer to ) All Page 19 1 Dec 201

20 P010 P020 P00 (PATCH) (COWL) P00 P00 1 PLY TABLE PLY ORIENTATION P010 + P020 - P00 + P00 + P00-2 A 2 A inches (1.9 cm) NOTE Bevel outer edge of repair patch to fill radius at cowling flange tangent. Taper original cowl flange at damaged edges to create smooth transition for repair plies SECTION A-A MISSING PORTION OF COWL FLANGE 7.10 inches (18.0 cm) LEGEND 1. Upper Cowl 2. Repair Patch Ensure each ply overlaps the previous ply by at least 0. inch (12.7 mm). SR22_MM71_2079 Page 20 Figure Cowl Flange Repair All