Cirrus SR20 Maintenance Manual page 53

C I R R U S
A I R P L A N E M A I N T E N A N C E M A N U A L
(d) Remove MCU cover.
(e) Remove circuit board assembly.
(f) Remove screw, washers, and nut securing fuse to bus bar 10.
(g) Remove screw, washers, and nut securing fuse to current shunt.
(h) Remove fuse from MCU.
(6) Installation - Midi Fuse 10
(a) Position fuse to current shunt and secure with screw, washers, and nut.
(b) Position fuse to bus bar 10 and secure with screw, washers, and nut.
(c) Install circuit board assembly.
(d) Install MCU cover.
(e) Connect battery 1.
(f) Perform Operational Inspection - Master Control Unit.
(g) Install engine cowling.
(7) Removal - Midi Fuse 19
(a) Set BAT1, BAT2, and AVIONICS switches to OFF positions.
(b) Remove engine cowling.
(c) Disconnect battery 1.
(d) Remove MCU cover.
(e) Remove circuit board assembly.
(f) Remove screw, washers, and nut securing fuse to current shunt.
(g) Remove screw securing fuse to power diode.
(h) Remove fuse from MCU.
(8) Installation - Midi Fuse 19
(a) Position fuse to power diode and secure with screw.
(b) Position fuse to current shunt and secure with screw, washers, and nut.
(c) Install circuit board assembly.
(d) Install MCU cover.
(e) Connect battery 1.
(f) Perform Operational Inspection - Master Control Unit.
(g) Install engine cowling.
(9) Removal - Midi Fuse 17
(a) Set BAT1, BAT2, and AVIONICS switches to OFF positions.
(b) Remove engine cowling.
(c) Disconnect battery 1.
(d) Remove MCU cover.
(e) Remove circuit board assembly.
(f) Remove nuts securing 3 bus bar 11s to breakers.
(g) Remove screw securing midi fuse 7 to power diode.
(h) Remove screw securing midi fuse 19 to power diode.
(i) Remove nut and washers securing bus bar 19 to bus bar 16.
(j) Remove nuts and washers securing RH clamp to bus bar 14.
(k) Remove screw, washers, and nut securing fuse to busbar 14.
(l) Remove screw, washers, and nut securing fuse to busbar 17.
(10) Installation - Midi Fuse 17
(a) Position fuse to busbar 17 and secure with screw, washers, and nut.
(b) Position fuse to busbar 14 and secure with screw, washers, and nut.
(c) Position bus bar 14 into clamp and secure with washers and nuts.
EFFECTIVITY:
Serials w/ MCU 19900-001
(Refer to 24-30)
(Refer to 24-30)
(Refer to 24-30)
(Refer to 71-10)
(Refer to 71-10)
(Refer to 24-30)
(Refer to 24-30)
(Refer to 24-30)
(Refer to 24-30)
(Refer to 71-10)
(Refer to 71-10)
(Refer to 24-30)
(Refer to 24-30)
M O D E L S R 2 0
(Refer to 24-30)
(Refer to 24-30)
19 Sep 2017
24-30
Page 53