CIRRUS AIRPLANE MAINTENANCE MANUAL MODELS SR22 AND SR22T
24-30
Page 49
Serials w/ MCU 19900-001
EFFECTIVITY:
T. Field Control Module - Serials w/ MCU 19900-001 (See Figure 24-307)
The ALT 1 and ALT 2 field control modules are integral to the MCU. The ALT 1 field control module is
located on the lower, RH side of chassis. The ALT 2 field control module is located on the upper, RH
side of chassis floor.
(1) Removal - ALT 1 Field Control Module
(a) Set BAT 1, BAT 2, and AVIONICS switches to OFF positions.
(b) Remove engine cowling. (Refer to 71-10)
(c) Disconnect battery 1. (Refer to 24-30)
(d) Remove MCU cover. (Refer to 24-30)
(e) Remove MCU bottom cover. (Refer to 24-30)
(f) Remove circuit board assembly. (Refer to 24-30)
(g) Disconnect wire harness from field control module.
(h) Remove screw and washer securing field control module to chassis.
(i) Slide field control module from under retainer lip. Remove field control module from air-
plane.
(2) Installation - ALT 1 Field Control Module
(a) Position field control module under retainer lip on chassis and secure with screws and
washers.
(b) Connect wire harness to field control module.
(c) Install circuit board assembly. (Refer to 24-30)
(d) Install MCU bottom cover. (Refer to 24-30)
(e) Install MCU cover. (Refer to 24-30)
(f) Connect battery 1. (Refer to 24-30)
(g) Perform Operational Inspection - Master Control Unit. (Refer to 24-30)
(h) Install engine cowling. (Refer to 71-10)
(3) Removal - ALT 2 Field Control Module
(a) Set BAT 1, BAT 2, and AVIONICS switches to OFF positions.
(b) Remove engine cowling. (Refer to 71-10)
(c) Disconnect battery 1. (Refer to 24-30)
(d) Remove MCU cover. (Refer to 24-30)
(e) Remove circuit board assembly. (Refer to 24-30)
(f) Remove screw securing upper RH standoff to chassis.
(g) Disconnect wire harness from field control module.
(h) Remove screw securing bus bar 8 and terminal ring 736 to power diode.
(i) Remove nut and spacers securing bus bar 8 to chassis.
(j) Remove nuts and spacers securing bus bar 9 to chassis.
(k) Remove bolt, washers, and nuts securing ALT 2 cable and bus bar 9 to chassis.
(l) Remove or relocate bus bar 8 and bus bar 9 assembly to allow removal of field control
module.
(m) Remove screw and washers securing field control module to chassis.
(n) Slide field control module from under retainer lip. Remove field control module from air-
plane.
01 Jan 2012