Readout of the Slat Position Pickoff Unit (PPU) Data

TASK 27-80-00-860-801-A
Readout of the Slat Position Pickoff Unit (PPU) Data

ZONE: 210

1. Reason for the Job
This readout and check of the Position Pickoff Unit (PPU) Data during a maintenance action makes sure that the slat transmission system is in the correct position.
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. 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 31-32-00-860-006-A	Procedure to Get Access to the SYSTEM REPORT/TEST F/CTL Page

3. Job Set-up
Subtask 27-80-00-860-065-A

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

4. Procedure
Subtask 27-80-00-740-050-A

A. Readout of the Slat PPUs Data on the Centralized Fault Display System (CFDS) (before maintenance action)

NOTE: Airbus recommends to do the readout and recording of the PPU angles before the maintenance action.
In case of a loss of the torque shaft fixture you can put the transmission system back to the initial condition (without a complete adjustment of the system).

(1) Get access to the SYSTEM REPORT/TEST (F/CTL) page on the Multipurpose Control Display Unit (MCDU) (Ref. AMM TASK 31-32-00-860-006).
(2) Do the readout of the slat PPU angles (degrees) on the MCDU as follows:

NOTE: You can do this readout in all slat positions (fully retracted or extended position).

ACTION	RESULT
On the MCDU: 1.Push the line key adjacent to the < SFCC 1 indication.	On the MCDU display: Page 1 of the SFCC 1 menu comes into view.
2.Push the NEXT PAGE button.	Page 2 of the SFCC 1 menu comes into view.
3.Push the line key adjacent to the SYSTEM DATA SLT> indication.	The SLAT SYSTEM DATA submenu comes into view.
4.Push the line key adjacent to the line key adjacent to the < PPU indication.	The PPU DATA page comes into view.
5.Record the LH and RH Asymmetry Position Pick-off Unit (APPU) and the Feedback Position Pick-off Unit (FPPU) angles (degrees) or push (in) the line key adjacent to PRINT > to get a print out of the screen. NOTE: In case of a loss of the torque shaft fixture you can put the transmission system back to the initial condition (without a complete adjustment of the system).
6.Push the line key adjacent to < RETURN frequently until the CFDS menu page is shown.

(3) After the readout: Go back to your maintenance procedure and continue with the next steps.

Subtask 27-80-00-740-051-A

B. Check of the Slat PPUs on the CFDS (after maintenance action)
(1) Get access to the SYSTEM REPORT/TEST (F/CTL) page on the Multipurpose Control Display Unit (MCDU) (Ref. AMM TASK 31-32-00-860-006).
(2) Do a check of the slat PPU angles (degrees) on the MCDU as follows:

NOTE: You can do this readout (check) in all slat positions (fully retracted or extended position).

ACTION	RESULT
On the MCDU: 1.Push the line key adjacent to the < SFCC 1 indication.	On the MCDU display: Page 1 of the SFCC 1 menu comes into view.
2.Push the NEXT PAGE button.	Page 2 of the SFCC 1 menu comes into view.
3.Push the line key adjacent to the SYSTEM DATA SLT> indication.	The SLAT SYSTEM DATA submenu comes into view.
4.Push the line key adjacent to the line key adjacent to the < PPU indication.	The PPU DATA page comes into view.
5.Record the LH and RH APPU and the FPPU angles (degrees) or push (in) the line key adjacent to PRINT > to get a print out of the screen.	If the slats are in fully retracted position: Make sure that the LH APPU and the FPPU angles are within a range of +/- 0.9 deg. Make sure that the RH APPU and the FPPU angles are within a range of +/- 0.9 deg. Make sure that the LH APPU and the RH APPU angles are within a range of +/- 0.7 deg. If the slats are in extended position: Make sure that the LH APPU and the FPPU angles are within a range of +/- 1.3 deg. Make sure that the RH APPU and the FPPU angles are within a range of +/- 1.3 deg. Make sure that the LH APPU and the RH APPU angles are within a range of +/- 0.7 deg.
6.Push the line key adjacent to < RETURN frequently until the CFDS menu page is shown.

(3) After the check of the PPU data: Go back to your maintenance procedure and continue with the next steps.

5. Close-up
Subtask 27-80-00-860-066-A

A. Aircraft Maintenance Configuration
(1) If necessary, de-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 07:06:18 UTC