Indicator Check on the Head-End Server Unit (HESU)

TASK 46-41-00-710-802-A
Indicator Check on the Head-End Server Unit (HESU)

ZONE: 200

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 3M (10 FT)- ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE
824

C. Referenced Information

REFERENCE	DESIGNATION
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)
TASK 31-21-00-750-002-A	Procedure to Set the Clock
TASK 34-10-00-860-004-A	Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-01	Automatic Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-02	Inertial Reference (IR) Alignment-Procedure to do a Check of the Links between each Flight Management and Guidance Computer (FMGC) and the three Air Data/Inertial Reference Units (ADIRUs)
TASK 46-41-00-710-804-A	System Monitoring Condition Check
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

3. Job Set-up
Subtask 46-41-00-860-061-C ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that:

The Air Data/Inertial Reference-Units (ADIRUs) are ON and aligned (Ref. AMM TASK 34-10-00-860-004).
The "Time and Date" are set (Ref. AMM TASK 31-21-00-750-002).
The "City Pair" is set.
The "Flight Number" is set.
The A/C is outside the hangar, with line-of-sight to the satellite.
The ALNA system operates correctly (Ref. AMM TASK 46-41-00-710-804).

Subtask 46-41-00-010-050-C ** ON A/C NOT FOR ALL

B. Get access to the avionics compartment.
(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at access door 824.
(2) Open access door 824 (Ref. AMM TASK 52-41-00-010-002).

Subtask 46-41-00-865-077-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	WAP	27MH	D07
2000VU	CINS-HESU	21RF	E02

4. Procedure
Subtask 46-41-00-710-051-D ** ON A/C NOT FOR ALL

A. Indicator check of the Head-End Server Unit (HESU)
(1) On the 1100RF:
(a) Make sure that the green AC ON indicator light is on.
(b) Make sure that the green DC ON indicator light is on.
(2) Open the flap on the front side of the 1000RF (HESU).
(3) On the 1000RF:
(a) Make sure that the green CPU indicator light is on.
(b) Make sure that the green IO indicator light is on.
(c) Make sure that the green STATUS indicator light is on.

5. Close-up
Subtask 46-41-00-410-051-C ** 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) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(3) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(4) Remove the access platform(s).

Subtask 46-41-00-860-062-B ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:26:14 UTC