Removal of the Datalink Control and Display Unit (DCDU)

TASK 46-21-21-000-001-A
Removal of the Datalink Control and Display Unit (DCDU)

ZONE: 211
ZONE: 212
FIN: 2TX1 ** ON A/C NOT FOR ALL
FIN: 2TX2 ** 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	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT
212	COCKPIT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
Datalink Control and Display Unit (DCDU)

3. Job Set-up
Subtask 46-21-21-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 46-21-21-865-050-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	LIGHTING/INSTL LT/GLARE/SHLD	5LF	Y05
** ON A/C NOT FOR ALL
FOR FIN: 2TX1 (DCDU1)
121VU	DCDU 1	6TX1	L17
** ON A/C NOT FOR ALL
121VU	DCDU 1	6TX1	K44
** ON A/C NOT FOR ALL
FOR FIN: 2TX2 (DCDU2)
121VU	DCDU 2	6TX2	L18
** ON A/C NOT FOR ALL
121VU	DCDU 2	6TX2	K45

4. Procedure
Subtask 46-21-21-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the DCDU
(1) Loosen the four screws (1) and washers (2).
(2) Pull the DCDU (3) from its housing.
(3) Disconnect the electrical connector (4).
(4) Remove the DCDU (3).
(5) Put a blanking cap on the disconnected electrical connector (4).

[Rev.10 from 2021] 2026.04.02 06:26:05 UTC