Deactivation of the Channel 1 of the Rudder Trim Actuator

TASK 27-22-00-040-001-A
Deactivation of the Channel 1 of the Rudder Trim Actuator

ZONE: 120
FIN: 10CC

1. Reason for the Job
MMEL 22-60-01A
FAC 1
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT
824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 27-22-00-710-002-A	Operational Test of the Rudder Trim Actuation

3. Job Set-up
Subtask 27-22-00-860-059-A

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 27-22-00-010-052-A

B. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the access door 824.
(2) Open the access door 824.

Subtask 27-22-00-865-055-A

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	B04
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	H10

4. Procedure
Subtask 27-22-00-040-050-A

A. Deactivation of the Channel 1 of the Rudder Trim Actuator
(1) On the panel 187VU, remove the relay 7CC1.
(2) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
5CC1.

Subtask 27-22-00-710-053-A

B. Do the operational test of the rudder trim actuation (Ref. AMM TASK 27-22-00-710-002) .

5. Close-up
Subtask 27-22-00-941-053-A

A. Safety Precautions
(1) Make an entry in the logbook.

Subtask 27-22-00-410-053-A

B. Close Access
(1) Close the access door 824.
(2) Remove the access platform(s).

Subtask 27-22-00-862-054-A

C. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001)

[Rev.10 from 2021] 2026.03.31 23:48:50 UTC