FQIS - No ARINC Data From ADIRU1(2)

TASK 28-42-00-810-847-A
FQIS - No ARINC Data From ADIRU1(2)

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

1. Possible Causes

FQIC [3QT]
ADIRU-1 [1FP1]
ADIRU-2 [1FP2]
aircraft wiring data link between the ADIRU1(2)(1FP1(2)) and the FQIC (3QT)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 284204
AMM 28-42-34-000-001	Removal of the Fuel Quantity-Indicating Computer (FQIC)
AMM 28-42-34-400-001	Installation of the Fuel Quantity-Indicating Computer (FQIC)
AMM 31-32-00-860-001	Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page
AMM 34-10-00-860-002	ADIRS Start Procedure
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU

3. Fault Confirmation
Subtask 28-42-00-710-096-A

A. Do the ADIRS start procedure AMM 34-10-00-860-002.

NOTE: If the ADIRUs are not switched on it will cause the Class 3 fault message, NO DATA FROM ADIRU1(2) to be shown.
This is because in the preferred mode of FQIC operation, it uses accelerations data (for pitch and roll) supplied by the ADIRUs.

(1) On the Multipurpose Control and Display Unit (MCDU), get access to the SYSTEM REPORT/TEST Menu page AMM 31-32-00-860-001.
(2) Push (in) the line key adjacent to FUEL indication.
(3) Push (in) the line key adjacent to FQIS STATUS indication.
(4) If the message NO DATA FROM ADIRU1(2) is shown, do the fault isolation.

NOTE: OPTIONAL TESTING
Where an ARINC reader and test connectors are available, the ARINC data can be checked at:

the Test Connector 198VC (188VU) on the rack 80VC
the FQIC 3QT rack connector.

4. Fault Isolation
Subtask 28-42-00-810-096-A

A. Temporarily replace the FQIC 3QT with a serviceable item AMM 28-42-34-000-001 and AMM 28-42-34-400-001.

NOTE: It is important to make sure that the FQIC is serviceable before you start more steps.

(1) If the message NO DATA FROM ADIRU1(2) is not shown:

complete the installation of the FQIC [3QT] , AMM 28-42-34-000-001 and AMM 28-42-34-400-001.

(2) If the message NO DATA FROM ADIRU1(2) is shown:

Install the initial FQIC 3QT, AMM 28-42-34-000-001 and AMM 28-42-34-400-001.

(3) Replace the ADIRU-1 [1FP1] or ( ADIRU-2 [1FP2] ), AMM 34-12-34-000-001 and AMM 34-12-34-400-001.
(4) Do the test given in Para. 3.A.
(5) If the fault continues:

do a check on the aircraft wiring data link between the ADIRU1(2)(1FP1(2)) and the FQIC (3QT) ASM 284204.

(6) Repair/replace all the unserviceable wiring and connectors.
(7) Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:29:07 UTC