Removal of the Residual Pressure Control Unit

TASK 21-31-35-000-001-A
Removal of the Residual Pressure Control Unit

FIN: 9HL ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
811

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
Residual Pressure Control Unit

3. Job Set-up
Subtask 21-31-35-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 21-31-35-865-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	RPCU	4HL	X23

Subtask 21-31-35-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 1M(3 FT) in position at the access door 811.
(2) Open the access door 811.

4. Procedure
Subtask 21-31-35-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Residual Pressure Control-Unit
(1) Disconnect the electrical connectors (8) and (9).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the screw (4) and the washer (3), and disconnect the bonding strap (2).
(4) Remove the screws (7) and the washers (6).
(5) Remove the control unit (5) from the mounting (1).

[Rev.10 from 2021] 2026.04.02 06:11:15 UTC