Reactivation of the CPC1

TASK 21-31-00-440-004-A
Reactivation of the CPC1

1. Reason for the Job
MMEL 21-31-01A
AUTOMATIC CABIN PRESSURE CONROL SYSTEM (CPC, OUTFLOW VALVE AUTO CHANNEL) (FAA ONLY)
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 21-31-00-710-002-A	Operational Test of the Pressure Control and Monitoring
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)

3. Job Set-up
Subtask 21-31-00-861-070-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 21-31-00-865-077-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/CAB/PRESS/CTL1	1HL	D09

4. Procedure
Subtask 21-31-00-710-070-A

A. Operational Test of the Pressure Control and Monitoring (Ref. AMM TASK 21-31-00-710-002).

5. Close-up
Subtask 21-31-00-862-066-A

A. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:11:13 UTC