Installation of the Fuel Quantity-Indicating Computer (FQIC)

TASK 28-42-34-400-001-A
Installation of the Fuel Quantity-Indicating Computer (FQIC)

ZONE: 122
FIN: 3QT

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
122	AVIONICS COMPARTMENT
811

C. 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 28-42-00-740-001-A	Status Report (BITE)
TASK 28-46-00-740-001-A	Functional (BITE) Test
TASK 32-69-00-860-001-A	Simulation of Flight (With Aircraft on Ground)
Fuel Quantity-Indicating Computer (FQIC)

3. Job Set-up
Subtask 28-42-34-860-050-A

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 ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the access door 811.
(3) Make sure that the access door 811 is open.

Subtask 28-42-34-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	FUEL/FQI/CHAN/1	1QT	A13
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L26
** ON A/C ALL
121VU	FUEL/FQI/CHAN/2	2QT	M27
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L25

4. Procedure
Subtask 28-42-34-420-050-A

A. Installation of the FQIC (3QT)
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Install the FQIC (4) in its rack (2).
(3) Connect the FQIC (4) to the electrical connector (1).
(4) Attach the FQIC (4) to its rack (2) with the knurled nuts (3).

Subtask 28-42-34-865-052-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	FUEL/FQI/CHAN/1	1QT	A13
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L26
** ON A/C ALL
121VU	FUEL/FQI/CHAN/2	2QT	M27
** ON A/C NOT FOR ALL
121VU	FUEL/FQI/CHANNEL/1 AND 2	8QT	L25

Subtask 28-42-34-740-050-A

C. BITE test
(1) Do a BITE test of the FQIC (3QT) (Ref. AMM TASK 28-42-00-740-001) and (Ref. AMM TASK 28-46-00-740-001):
(a) If the fault messages "NO DATA FROM ADIRU 1(2)" and/or "NO DATA FROM CFDIU" are shown on the LAST LEG REPORT page, ignore them. To clear these fault messages, do a simulation of flight, with the aircraft on the ground (Ref. AMM TASK 32-69-00-860-001) two times:
1 On the MCDU, on the landing gear page, it is necessary to push the line key adjacent to the UPLOCKED indication (not the EXTENDED indication).

5. Close-up
Subtask 28-42-34-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 811.
(3) Remove the access platform(s).

Subtask 28-42-34-862-050-A

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

[Rev.10 from 2021] 2026.04.02 06:46:01 UTC