Procedure to use the ADIRU to Find the Pitch and Roll Data

TASK 12-11-28-860-001-A
Procedure to use the ADIRU to Find the Pitch and Roll Data

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-007-A	Use of Magnetic Level Indicators (MLI)
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 31-36-00-740-008-A	Access to the Parameter Call-Up Menus

3. Job Set-up
Subtask 12-11-28-861-054-A

A. Energize the Aircraft Electrical Circuits
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

4. Procedure
Subtask 12-11-28-860-069-C

A. Procedure to enter the Parameter Alpha Call-up through the Multipurpose Control and Display Unit (MCDU)
(1) On panel 20VU, set the 3 ADIRS switches to the NAV position:

ACTION	RESULT
1.On the MCDU, turn the BRT knob to the ON position.	The MCDU is on.
2.Enter the Parameter Alpha Call-up through the MCDU (Ref. AMM TASK 31-36-00-740-008).
3.Read and write down the ROLL and PITCH data.
4.Push the line key adjacent to the CLEAR ALL indication.	The AIDS menu page comes into view.

(2) In Table 1, use the PITCH data to find the equivalent number.
(3) In Table 1, use the ROLL data to find the equivalent letter.
(4) Put together the number and the letter to identify the square to use in the MLI procedure (Ref. AMM TASK 12-11-28-650-007).
TABLE 1

Pitch	Ref	Roll	Ref
minus 1.5	1	minus 1.5	A
minus 1.0	2	minus 1.0	B
minus 0.5	3	minus 0.5	C
0.0	4	0.0	D
plus 0.5	5	plus 0.5	E
plus 1.0	6	plus 1.0	F
plus 1.5	7	plus 1.5	G

5. Close-up
Subtask 12-11-28-860-070-A

A. Aircraft Maintenance Configuration
(1) On panel 20VU, set the 3 ADIRS switches to the OFF position.
(2) On the MCDU control panel:
(a) Push the RETURN key until the initial screen shows.
(b) Set the BRT knob to the OFF position.

Subtask 12-11-28-862-054-A

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:45:10 UTC