CIRRUS AIRPLANE MAINTENANCE MANUAL MODELS SR22 AND SR22T CHAPTER 8-10: LEVELING GENERAL. Leveling 8-10: LEVELING. 1. General

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1 CIRRUS AIRPLANE MAINTENANCE MANUAL Leveling CHAPTER 8-10: LEVELING GENERAL 8-10: LEVELING 1. General This chapter provides information necessary to properly level the airplane for any of the various maintenance, overhaul, or major repairs which might become necessary. For general longitudinal leveling, the cabin door sill edge is parallel within 0.10 relative waterline 100. The door sill is used in conjunction with a spirit level to determine airplane ground attitude. For specific longitudinal leveling, two forward leveling points are located on either side of the cowl at fuselage station One aft point is located below the RE1 empennage access panel aft of the horizontal stabilizer, at fuselage station Pegged ruler gauges suspended from the leveling points are used in conjunction with a transit to determine ground attitude. For general lateral leveling, a straight edge may be placed across both cabin door sills. The door sill is used in conjunction with a spirit level to determine airplane ground pitch. For specific lateral leveling, an alignment brace bar may be placed across the upper engine mount weldment attach points. The attach points are used in conjunction with a digital level to determine airplane ground pitch. 1

2 CHAPTER 8-10: LEVELING 2. Maintenance Practices CIRRUS AIRPLANE MAINTENANCE MANUAL A. Longitudinal Leveling (1) Spirit Level Using Door Sill (See Figure ) (a) Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Spirit Level - Any Source Level the airplane. (b) (c) (d) Open LH or RH cabin door. Position and hold spirit level to composite ledge below door sill. To level airplane longitudinally, deflate nose gear tire to center bubble in level. (2) Transit Level Using Fuselage Leveling Points (See Figure ) (a) Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Transit Level - Any Source Leveling Ruler Gauge (Pegged), Forward and Aft T6320 Cirrus Design Leveling Aircraft Hydraulic Jack - Any Source Leveling (b) (c) (d) At WL on side of fuselage, remove screws at forward longitudinal leveling point located at FS 98.4, and aft longitudinal leveling point located at FS Position pegged ruler gauges at forward and aft longitudinal leveling points. Position aircraft jack at aft tail tie-down. 2

3 CIRRUS AIRPLANE MAINTENANCE MANUAL CHAPTER 8-10: LEVELING (e) (f) Position and sight transit level on ruler gauges and observe transit level crosshair locations on rulers. To level airplane longitudinally, raise or lower jack as required until transit level is aligned with the same measurement on both ruler gauges. (Refer to 7-10) 3

4 CHAPTER 8-10: LEVELING CIRRUS AIRPLANE MAINTENANCE MANUAL Figure : Longitudinal Leveling WL 100 SPIRIT LEVEL DOOR SILL FS FORWARD LEVELING HOLE Ø 0.25 FS 98.4 AFT LEVELING HOLE Ø 0.25 WL FS WL WL NOTE At door opening, position spirit level along lower composite ledge located below door seal, to represent pitch axis for pitch attitude. 1 LEGEND 1. Transit Level 2. Aircraft Hydraulic Jack 3. Ruler Gauge (Pegged) SR22_MM08_4373 4

5 CIRRUS AIRPLANE MAINTENANCE MANUAL CHAPTER 8-10: LEVELING B. Lateral Leveling (1) Spirit Level Using Door Sills (See Figure ) (a) Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Spirit Level - Any Source Level the airplane. Straight Edge minimum 5.0 ft (1.5 m) Spacer Blocks inches ( cm) - Any Source Level platform. - Any Source Level platform. (b) Remove main landing gear fairings. (Refer to 32-10) (c) Open both doors on airplane. (d) Place spacer blocks on LH and RH door sills so that height of blocks is higher than door seals. (e) Place a straight edge on top and perpendicular to spacer blocks positioned on door sills, centered. (f) Place spirit level on top and parallel to straight edge, centered. (g) To level airplane laterally, deflate main gear tire to center bubble in level. (h) Install main landing gear fairings. (Refer to 32-10) (2) Digital Level Using Engine Mount Weldment (See Figure ) (a) Acquire necessary tools, equipment, and supplies. Description P/N or Spec. Supplier Purpose Engine Mount Leveling Bar T2474 Cirrus Design Leveling Digital Level - Any Source Leveling 5

6 CHAPTER 8-10: LEVELING CIRRUS AIRPLANE MAINTENANCE MANUAL (b) Remove main landing gear fairings. (Refer to 32-10) (c) Remove upper engine cowling. (Refer to 71-10) (d) Position leveling bar on upper engine mount weldment. At flat, upper surface of leveling bar, position digital level lengthwise. (e) To level airplane laterally, deflate LH or RH main landing gear tire as required until digital level reads 0. NOTE Perform tasks that required leveling prior to leveling equipment removal and cowl reinstallation. (f) Remove digital level and engine mount leveling bar from airplane. (g) Install upper engine cowling. (Refer to 71-10) (h) Install main landing gear fairings. (Refer to 32-10) 6

7 CIRRUS AIRPLANE MAINTENANCE MANUAL CHAPTER 8-10: LEVELING Figure : Lateral Leveling SPIRIT LEVEL STRAIGHT EDGE STRAIGHT EDGE STRAIGHT EDGE SPACER BLOCK DOOR SEAL (REF) DOOR SILL DOOR SEAL (REF) DOOR SILL SPACER BLOCK 2 1 NOTE Position spirit level on straight edge so it points outboard, to represent roll axis for roll attitude. Position alignment brace bar at upper engine mount weldment attach points. To level airplane laterally, deflate LH or RH main landing gear tire as required until digital level reads 0. LEGEND 1. Digital Level 2. Engine Mount Leveling Bar SR22_MM08_4374 7

8 CHAPTER 8-10: LEVELING CIRRUS AIRPLANE MAINTENANCE MANUAL Intentionally Left Blank 8