Installation of the Control Unit

TASK 25-27-34-400-002-A
Installation of the Control Unit

FIN: 60DS ** ON A/C NOT FOR ALL
FIN: 66DS ** 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	2	STEPLADDER 2.0 M (6.6 FT)
No specific	Torque wrench: range to between 8.8 and 5.3 lbf.in (0.10 and 0.06 m.daN )

B. 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 25-27-00-740-001-A	Bite Test of the Heated Floor Panel System
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Control Unit 60DS, 66DS

3. Job Set-up
Subtask 25-27-34-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the avionics compartment door 811 (Ref. AMM TASK 52-41-00-010-002) is open.
(3) Make sure that the STEPLADDER 2.0 M (6.6 FT) is in position.

Subtask 25-27-34-865-057-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	DOOR AREA HTG PANELS-CTL	54DS	A07
2000VU	DR AREA HTG PNLS-DR1-FPH-RH	52DS	A06
2000VU	DR AREA HTG PNLS-DR1-FPH-LH	51DS	A05
** ON A/C NOT FOR ALL
2000VU	DR AREA HTG PNLS-DOOR1-FPH-RH	52DS	F06
2000VU	DR AREA HTG PNLS-DOOR1-FPH LH	51DS	F05

4. Procedure
Subtask 25-27-34-420-052-A ** ON A/C NOT FOR ALL

A. Installation of the Control Unit 60DS, 66DS.

Control Unit 60DS, 66DS ** ON A/C NOT FOR ALL

NOTE: The procedure for the control units are the same.

(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Carefully move the control unit (6) on the adapter assembly (7).

NOTE: Make sure that the locking catch (5) holds the control unit (6) in position.

(5) Connect the Electrical Connections:

CAUTION: MAKE SURE THAT THE SPRING LATCHES CORRECTLY HOLD THE CONNECTOR IN THE FULLY ENGAGED POSITION. THE SPRING LATCHES PREVENT UNWANTED MOVEMENT OF THE CONNECTOR, AND THUS THE RISK OF ARCING, WHICH CAN CAUSE DAMAGE TO THE UNIT.

(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the electrical connector (1) with the spring latches (3).
(d) Connect the electrical connector (2) with the screws (4).
1 TORQUE the screws (4) to between 8.8 and 5.3 lbf.in (0.10 and 0.06 m.daN )

Subtask 25-27-34-865-058-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	DOOR AREA HTG PANELS-CTL	54DS	A07
2000VU	DR AREA HTG PNLS-DR1-FPH-RH	52DS	A06
2000VU	DR AREA HTG PNLS-DR1-FPH-LH	51DS	A05
** ON A/C NOT FOR ALL
2000VU	DR AREA HTG PNLS-DOOR1-FPH-RH	52DS	F06
2000VU	DR AREA HTG PNLS-DOOR1-FPH LH	51DS	F05

Subtask 25-27-34-740-052-A ** ON A/C NOT FOR ALL

C. Do the BITE test of the heated floor panel system (Ref. AMM TASK 25-27-00-740-001).

5. Close-up
Subtask 25-27-34-410-051-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access to the avionics compartment:
(a) Close the avionics compartment door 811 (Ref. AMM TASK 52-41-00-410-002).
(b) Remove the STEPLADDER 2.0 M (6.6 FT).

Subtask 25-27-34-862-051-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.03.31 23:32:59 UTC